Combustor and gas water heater

Abstract

The invention belongs to the technical field of kitchen appliances, and discloses a burner and a gas water heater. The combustor comprises a shell, a heat insulation plate and a flow guide piece. The top of the shell is provided with a connecting piece, an installation space is formed outside the connecting piece and used for being in sealing fit with a heat exchanger, and a flow guide space is formed inside the connecting piece to guide high-temperature gas into the heat exchanger. And the flow guide piece is provided with a flow guide cambered surface for guiding high-temperature gas into the flow guide space. Therefore, the combustor and the heat exchanger are connected in a sealed mode, on one hand, the possibility that high-temperature gas is diffused outwards can be reduced, and on the other hand, low-temperature air can be prevented from entering the interior through the connecting position. And the possibility that high-temperature gas forms a vortex or a dead zone at the butt joint of the combustor and the heat exchanger can be effectively reduced through the flow guide cambered surface and the flow guide space, it is ensured that the high-temperature gas can smoothly enter the heat exchanger, the heat transfer efficiency of the high-temperature gas is effectively improved, and it is also ensured that the combustor can continuously and stably operate.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and particularly to a burner and a gas water heater. Background Art

[0002] In a gas water heater, the burner and the heat exchanger are the core heat exchange structures, and the rationality of their docking design directly affects the thermal efficiency, safety and service life of the equipment.

[0003] In the existing technology, the top of the burner is directly connected and communicated with the heat exchanger, and a sealing structure is provided at the connection part between the two to ensure the sealing performance of the connection, so that the high-temperature gas in the burner can flow into the heat exchanger.

[0004] However, due to the influence of structural design errors, differences in the thermal expansion and contraction characteristics of materials or installation process errors, etc., when the high-temperature gas continuously flows, gaps are likely to be generated between the docking surfaces of the burner and the heat exchanger, resulting in the outward diffusion of hot gas, which may cause potential safety hazards. Moreover, when the high-temperature gas enters the heat exchanger from the burner, due to the sudden change in cross-section, problems such as eddy currents or dead zones are likely to be formed, thereby interfering with the flow of the high-temperature gas and causing poor heat transfer efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a burner and a gas water heater, which solve the problems that the high-temperature gas in the burner in the existing technology is easy to diffuse outward when entering the heat exchanger, and eddy currents or dead zones are likely to be formed during the flow of the high-temperature gas, resulting in poor heat transfer efficiency.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a burner, which includes:

[0008] A housing, the top of the housing has a connecting piece, the connecting piece extends upward along the gas flow direction, and the side of the connecting piece close to the housing extends obliquely inward to the housing to form an installation space outside the connecting piece, and the installation space is used for sealing cooperation with the heat exchanger, and a diversion space is formed inside the connecting piece to divert the high-temperature gas into the heat exchanger;

[0009] A heat insulation plate, which is arranged on the inner side wall of the housing;

[0010] A diversion member, which is arranged on the side of the heat insulation plate close to the connecting piece, and at least part of the diversion member extends into the diversion space and has a diversion arc surface for guiding the high-temperature gas into the diversion space.

[0011] Optionally, a convection cavity is formed between the outer shell and the heat insulation plate. The outer shell has an air inlet communicating with the convection cavity, and the heat insulation plate has an air outlet communicating with the convection cavity. The air inlet and the air outlet are staggeredly distributed.

[0012] Optionally, the heat insulation plate includes:

[0013] A first heat insulation plate, a convection plate is arranged between the first heat insulation plate and the outer shell. The convection plate is provided with convection openings which are staggeredly distributed with both the air inlet and the air outlet.

[0014] Optionally, the air inlet is opened on the upper side or the lower side of the outer shell, the air outlet is opened on the upper side or the lower side of the first heat insulation plate, and the convection openings are opened in the middle of the convection plate.

[0015] Optionally, the heat insulation plate includes:

[0016] A second heat insulation plate, the air outlet is opened in the middle of the second heat insulation plate, and the air inlet is opened on the upper side or the lower side of the outer shell.

[0017] Optionally, a plurality of guide strips are convexly arranged at intervals on the inner side wall of the outer shell, and the guide strips extend along the gas flow direction.

[0018] Optionally, the guide strips are equally spaced along a first direction; or

[0019] In the first direction, the distance between two adjacent guide strips decreases along the direction away from the edge of the side wall of the outer shell.

[0020] Optionally, the extending direction of the air inlet intersects with the extending direction of the air outlet.

[0021] Optionally, the air inlets are opened on both the upper side and the lower side of the outer shell.

[0022] Optionally, the air inlet includes a plurality of air inlet holes spaced at intervals along a second direction.

[0023] Optionally, in the second direction, the distance between two adjacent air inlet holes increases along the direction away from the edge of the side wall of the outer shell.

[0024] Optionally, the number of the air inlet holes on the upper side of the outer shell is greater than the number of the air inlet holes on the lower side of the outer shell.

[0025] Optionally, the plurality of air inlet holes on the lower side of the outer shell are equally spaced.

[0026] Optionally, the guide member includes:

[0027] The deflector plate, and the deflector arc surface is disposed on a side of the deflector plate facing away from the housing.

[0028] Optionally, a plurality of mounting pieces are spaced apart on the deflector plate, and the mounting pieces are fixedly connected to the connecting pieces; and / or

[0029] The deflector arc surface is provided with a plurality of reinforcing grooves at intervals; and / or

[0030] The bending angle of the deflector arc surface is between 30° and 80°.

[0031] In a second aspect, the present invention further provides a gas water heater, which includes:

[0032] A casing;

[0033] A burner as described in any one of the first aspect, disposed inside the casing.

[0034] Advantages of the present invention:

[0035] In the first aspect, by providing a connecting piece at the top of the housing, and the connecting piece extends obliquely to respectively form a mounting space and a deflector space. The mounting space can form a sealing fit with the heat exchanger, so that sufficient contact is formed between the heat exchanger and the housing, thereby ensuring that an effective sealing fit can be formed at the connection between the two. The deflector arc surface provided on the deflector can introduce high-temperature gas into the deflector space, and the deflector space can play a guiding role in the flow of the high-temperature gas. At the same time, the connecting piece can also form an interface with the inner wall of the heat exchanger, thereby avoiding a space with a sudden cross-sectional change, ensuring that the high-temperature gas can be smoothly deflected into the heat exchanger to quickly realize the heat exchange of the high-temperature gas. The setting of the heat insulation plate ensures that the high-temperature gas does not directly contact the housing to avoid the continuous increase of the housing temperature. Therefore, when the burner is in use, a reduced opening can be formed on the upper side of the housing through the mounting space to form a relatively good sealing connection with the heat exchanger through plug-in fit and fixed connection, reducing the influence of design errors and installation process errors on the seal, and also reducing the possibility of reducing the sealing effect due to deformation caused by heat during the continuous flow of high-temperature gas. A good sealing effect can, on the one hand, avoid the leakage of high-temperature gas, and on the other hand, also avoid the entry of low-temperature air into the housing through the connection. And through the deflector arc surface and the deflector space, a guiding effect can be exerted on the high-temperature gas, and the deflector arc surface and the connecting piece can be close to or even flush with the inner side wall of the heat exchanger, so that there is no space with a sudden cross-sectional change in the flow direction of the high-temperature gas, effectively reducing the possibility of forming eddy currents or dead zones at the docking part of the burner and the heat exchanger, ensuring that the high-temperature gas can smoothly enter the heat exchanger, effectively improving the heat transfer efficiency, and also being beneficial to ensuring the continuous and stable operation of the burner, thereby improving the combustion efficiency.

[0036] In a second aspect, when the gas water heater is in use, the high-temperature gas in the burner can be smoothly guided into the heat exchanger to ensure that the burner can operate continuously and stably for a long time, thereby effectively improving the combustion efficiency. At the same time, the air-cooling structure can be used inside the burner to effectively dissipate heat from the outer shell of the burner, reducing the possibility of heat radiation outward through the outer shell. At the same time, the air-cooling can also bring the heat transferred to the outer shell back into the burner to improve the utilization rate of heat, which is beneficial to improving the combustion efficiency of the burner. Description of the Drawings

[0037] Figure 1 is a schematic structural view of the burner in Embodiment 1 of the present invention;

[0038] Figure 2 is a front structural sectional view of the burner in Embodiment 1 of the present invention;

[0039] Figure 3 is a side structural sectional view of the burner in Embodiment 1 of the present invention;

[0040] Figure 4 is an exploded view of the structure of the burner in Embodiment 1 of the present invention

[0041] Figure 5 is a schematic internal structural view of the burner in Embodiment 1 of the present invention

[0042] Figure 6 is a schematic structural view of the gas water heater in Embodiment 1 of the present invention.

[0043] Figure 7 is a schematic structural view of the burner in Embodiment 2 of the present invention;

[0044] Figure 8 is a schematic structural view of the burner in Embodiment 3 of the present invention.

[0045] In the figure:

[0046] 1. Outer shell; 11. Air inlet; 12. Flow guide strip; 2. Connecting piece; 21. Installation space; 22. Flow guide space; 3. Heat exchanger; 4. Heat insulation board; 41. Air outlet; 42. First heat insulation board; 43. Convection board; 44. Convection port; 45. Second heat insulation board; 5. Flow guide member; 51. Flow guide plate; 52. Installation piece; 53. Reinforcing groove; 6. Machine shell. Detailed Embodiments

[0047] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention are shown in the drawings, rather than all structures.

[0048] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the case where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0050] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0051] The embodiment of the present invention discloses a burner and a gas water heater.

[0052] Embodiment 1

[0053] Referring to Figures 1 to 3 , the burner includes a housing 1, a heat insulation plate 4, and a flow guiding member 5. The top of the housing 1 has a connecting piece 2. The connecting piece 2 extends upward along the gas flow direction. One side of the connecting piece 2 close to the housing 1 extends obliquely inwardly of the housing 1 to form an installation space 21 outside the connecting piece 2. The installation space 21 is used for sealing cooperation with the heat exchanger 3. A flow guiding space 22 is formed inside the connecting piece 2 to guide the high-temperature gas into the heat exchanger 3; the heat insulation plate 4 is arranged on the inner side wall of the housing 1; the flow guiding member 5 is arranged on the side of the heat insulation plate 4 close to the connecting piece 2. The flow guiding member 5 at least partially extends into the flow guiding space 22 and has a flow guiding arc surface for guiding the high-temperature gas into the flow guiding space 22.

[0054] Specifically, the outer shell 1 is formed by enclosing a plate-like structure, and its cross-sectional shape can be square. At the top of the outer shell 1, there is a connecting piece 2, which can be an integral structure or be fixedly connected by welding or other means. The connecting piece 2 includes an integral fixing part and connecting part. The lower side of the fixing part is fixedly connected to the outer shell 1, and the upper side extends obliquely inwardly of the outer shell 1. The connecting part is located on the side of the fixing part away from the outer shell 1. The connecting part can extend vertically upward, can also continue to extend obliquely inwardly of the outer shell 1, or can extend obliquely outwardly of the outer shell 1. A corresponding installation space 21 is formed on the outer side of the connecting piece 2 to be adapted to the heat exchanger 3. The lower side of the heat exchanger 3 can be inserted into the installation space 21. A plurality of connection positions are arranged at intervals on the fixing part, and each connection position can form a fixed connection with the heat exchanger 3, and the side walls of the connecting part and the fixing part are both in contact with the inner wall of the heat exchanger 3 to achieve a sealed connection. In order to improve the sealing effect, a high-temperature resistant coating or a gasket or other structures can also be provided on the contacting side walls. In this embodiment, a connection hole is provided at the connection position, and a bolt can be passed through each connection hole to realize the fixed connection between the fixing part and the heat exchanger 3. At least part of the space in the connecting piece 2 forms a gradually decreasing diversion space 22, and the diversion space 22 can gather the high-temperature gas in the middle and then divert it into the heat exchanger 3.

[0055] The heat insulation plate 4 is fixed on the inner side wall of the outer shell 1. They can be in contact with each other or maintain a certain interval. The heat insulation plate 4 is made of a material with a relatively high heat insulation coefficient. A diversion member 5 is provided on the side of the heat insulation plate 4 close to the connecting piece 2. The diversion member 5 can be an integral structure with the heat insulation plate 4 or be fixedly connected by bolt connection or welding or other means. The diversion member 5 extends along the gas flow direction so that its upper side can partially extend into the diversion space 22. On the side of the diversion member 5 facing away from the outer shell 1, it protrudes arcuately inwardly of the outer shell 1 to form a diversion arc surface.

[0056] By arranging a connecting piece 2 at the top of the outer shell 1, and the connecting piece 2 extends obliquely to form an installation space 21 and a diversion space 22 respectively. The installation space 21 can form a sealed fit with the heat exchanger 3, enabling sufficient contact between the heat exchanger 3 and the outer shell 1, thereby ensuring an effective sealed fit at the connection between the two. The diversion arc surface provided on the diversion member 5 can introduce high-temperature gas into the diversion space 22, and the diversion space 22 can play a guiding role in the flow of the high-temperature gas. At the same time, the connecting piece 2 can also form a connection with the inner wall of the heat exchanger 3, thus avoiding a space with a sudden cross-section change, ensuring that the high-temperature gas can be smoothly diverted into the heat exchanger 3 to quickly achieve the heat exchange of the high-temperature gas. The setting of the heat insulation plate 4 ensures that the high-temperature gas does not directly contact the outer shell 1, so as to avoid the continuous increase in the temperature of the outer shell 1. Therefore, when the burner is in use, a necking can be formed on the upper side of the outer shell 1 through the installation space 21, and a relatively good sealed connection with the heat exchanger 3 can be formed through plug-in fit and fixed connection, reducing the influence of design errors and installation process errors on the seal, and also reducing the possibility of the seal effect being reduced due to deformation caused by heat during the continuous flow of the high-temperature gas. The relatively good seal effect can, on the one hand, avoid the leakage of high-temperature gas, and on the other hand, also avoid the entry of low-temperature air into the interior of the outer shell 1 through the connection. And through the diversion arc surface and the diversion space 22, a diversion effect can be achieved on the high-temperature gas, and the diversion arc surface and the connecting piece 2 can be close to or even flush with the inner side wall of the heat exchanger 3, so that there is no space with a sudden cross-section change in the flow direction of the high-temperature gas, effectively reducing the possibility of the high-temperature gas forming eddy currents or dead zones at the docking part of the burner and the heat exchanger 3, ensuring that the high-temperature gas can smoothly enter the heat exchanger 3, effectively improving the heat transfer efficiency, and also being beneficial to ensuring the continuous and stable operation of the burner, thereby improving the combustion efficiency.

[0057] Referring to Figure 4 and Figure 5 , optionally, a convection chamber is formed between the outer shell 1 and the heat insulation plate 4. The outer shell 1 has an air inlet 11 communicating with the convection chamber, and the heat insulation plate 4 has an air outlet 41 communicating with the convection chamber. The air inlet 11 and the air outlet 41 are distributed in a staggered manner.

[0058] Specifically, a convection cavity is formed between the heat insulation plate 4 and the outer shell 1 with a gap therebetween. An air inlet 11 is provided on the outer shell 1. The air inlet 11 is composed of a plurality of long strip-shaped through holes, which can be located on the upper side or the lower side of the outer shell 1, or in the middle of the outer shell 1, and the plurality of through holes can be equally spaced. An air outlet 41 is provided on the heat insulation plate 4. The air outlet 41 can also be composed of a plurality of long strip-shaped through holes, which are staggeredly distributed with the air inlet 11. That is, when the air inlet 11 is located on the upper side or the lower side of the outer shell 1, the air outlet 41 is located in the middle of the heat insulation plate 4. Conversely, when the air inlet 11 is located in the middle of the outer shell 1, the air outlet 41 is located on the upper side or the lower side of the heat insulation plate 4. It should be understood that it is only necessary that the air inlet 11 and the air outlet 41 are staggeredly distributed, and the specific relative positions of the two can be designed according to the actual size of the convection cavity.

[0059] By setting the convection cavity, while the high-temperature gas flows towards the heat exchanger 3, the external air will also be drawn into the convection cavity by the fan through the air inlet 11 of the outer shell 1. At this time, the temperature of this air is relatively low, and it forms a wind-cooled gas after being drawn into the convection cavity. Since the air outlet 41 and the air inlet 11 are staggeredly distributed, the wind-cooled gas will directly come into full contact with the heat insulation plate 4 after entering the convection cavity, and then flow into the inner side of the heat insulation plate 4 through the air outlet 41 and enter the heat exchanger 3 together with the high-temperature gas. In this way, the wind-cooled air is used to dissipate heat from the heat insulation plate 4, reducing the temperature of the heat insulation plate 4 itself. At the same time, due to the staggered distribution of the air inlet 11 and the air outlet 41, a wind curtain is formed in the convection cavity, achieving a heat insulation effect and reducing the intensity of heat radiation to the outer shell 1, reducing the possibility of the continuous increase in the temperature of the outer shell 1. Moreover, after the wind-cooled gas exchanges heat with the heat insulation plate 4 and then enters the heat insulation plate 4, it can bring the heat transferred to the heat insulation plate 4 and the outer shell 1 back into the inner side of the heat insulation plate 4 and enter the heat exchanger 3 together with the original high-temperature gas for heat exchange, thereby further improving the utilization rate of heat, reducing heat loss, and effectively improving the efficiency of the burner.

[0060] Optionally, the heat insulation plate 4 includes a first heat insulation plate 42, and a convection plate 43 is provided between the first heat insulation plate 42 and the outer shell 1. The convection plate 43 is provided with through convection openings 44, and the convection openings 44 are staggeredly distributed with both the air inlet 11 and the air outlet 41.

[0061] Specifically, the heat insulation plates 4 provided on the front and rear sides of the outer shell 1 are the first heat insulation plates 42. The convection plate 43 stands upright in the convection cavity to divide the convection cavity into two parts. Through convection openings 44 are provided in the convection plate 43. The convection openings 44 can also be composed of a plurality of long strip-shaped through holes. The convection openings 44, the air inlet 11, and the air outlet 41 are all staggeredly distributed, that is, none of the three are directly connected.

[0062] By setting the convection plate 43, when the air-cooled gas enters through the air inlet 11, the air-cooled gas will first contact the convection plate 43 and flow through the convection port 44 to the heat insulation plate 4, and then enter the inner side of the heat insulation plate 4 through the air outlet 41 after contacting the heat insulation plate 4. In this way, the flow path of the air-cooled gas in the convection chamber is extended, thereby improving the heat insulation effect. And since the convection port 44, the air inlet 11 and the air outlet 41 are all misaligned, the air-cooled gas can form at least two air curtains in the convection chamber, further improving the blocking effect on heat radiation.

[0063] Optionally, the air inlet 11 is provided on the upper side or the lower side of the housing 1, the air outlet 41 is provided on the upper side or the lower side of the first heat insulation plate 42, and the convection port 44 is provided in the middle of the convection plate 43.

[0064] Specifically, air outlets 41 can be provided on both the upper side and the lower side of the first heat insulation plate 42, air inlets 11 can also be provided on both the upper side and the lower side of the housing 1 corresponding to the first heat insulation plate 42, and the convection port 44 is provided in the middle of the convection plate 43, so that the air-cooled gas will converge in the middle of the convection plate 43 to form an air curtain after entering through the air inlet 11, and then flow through the convection port 44 to the first heat insulation plate 42, and then disperse to flow to the air outlets 41 on the upper side and the lower side of the first heat insulation plate 42 respectively, thereby forming another air curtain.

[0065] Optionally, the heat insulation plate 4 includes a second heat insulation plate 45. The air outlet 41 is provided in the middle of the second heat insulation plate 45, and the air inlet 11 is provided on the upper side or the lower side of the housing 1.

[0066] Specifically, the heat insulation plates 4 provided on the left and right sides of the housing 1 are the second heat insulation plates 45, and the air outlets 41 of the second heat insulation plates 45 are located in the middle, and air inlets 11 can be provided on both the upper side and the lower side of the housing 1 corresponding to the second heat insulation plates 45, so that the air-cooled gas will converge to the middle of the second heat insulation plate 45 to form an air curtain after entering the air inlet 11, and then flow into the inner side of the second heat insulation plate 45 through the air outlet 41.

[0067] In this embodiment, based on the fact that the high-temperature gas is more concentrated on the front and rear sides of the housing 1, while the high-temperature gas on the left and right sides is relatively less, it is set that the heat insulation plates 4 on the front and rear sides of the housing 1 are the first heat insulation plates 42, and the heat insulation plates 4 on the left and right sides of the housing 1 are the second heat insulation plates 45. It should be understood that the specific distribution of the first heat insulation plate 42 and the second heat insulation plate 45 can be designed according to the structure of the actual burner, and all the heat insulation plates 4 can be set as the first heat insulation plates 42, or can be set as the second heat insulation plates 45.

[0068] Optionally, a plurality of flow guiding strips 12 are convexly provided at intervals on the inner side wall of the housing 1, and the flow guiding strips 12 extend along the gas flow direction.

[0069] Specifically, the inner sidewall of the outer shell 1 bulges inward to form a flow guide strip 12. The flow guide strip 12 extends vertically. The side surface of the flow guide strip 12 may or may not be in contact with the convection plate 43 or the heat insulation plate 4. The plurality of flow guide strips 12 are equally spaced along a first direction, and the first direction may intersect with the gas flow direction. In this embodiment, the first direction is perpendicular to the gas flow direction. By providing the flow guide strip 12, cutting can be formed after the air-cooled gas enters, so as to ensure the uniform flow of the air-cooled gas. At the same time, the provision of the flow guide strip 12 can also improve the strength of the outer shell 1.

[0070] Optionally, the extending direction of the air inlet 11 intersects with the extending direction of the air outlet 41.

[0071] Specifically, the through holes included in the air inlet 11 all extend in the vertical direction, and the through holes included in the air outlet 41 all extend in the horizontal direction. It is also possible to extend the through holes included in the air inlet 11 in the horizontal direction, and the through holes included in the air outlet 41 extend in the vertical direction. This further improves the convection effect of the air-cooled gas during the flowing process, and ensures that the air-cooled gas can uniformly flow into the heat insulation plate 4 through the air outlet 41.

[0072] Referring to Figure 2 and Figure 3 Optionally, the flow guide member 5 includes a flow guide plate 51. The flow guide arc surface is provided on the side of the flow guide plate 51 facing away from the outer shell 1.

[0073] Specifically, the flow guide plate 51 is only provided on the first heat insulation plate 42, and the two are of an integral structure. The flow guide plate 51 is integrally bent inward to form the above-mentioned flow guide arc surface, and the bending amplitude can be designed according to the actual space, which is not limited in the present invention. In this embodiment, the bending angle of the flow guide arc surface is between 30° and 80°.

[0074] By providing the flow guide plate 51 to form the flow guide arc surface, it is convenient to form flow guide arc surfaces with various bending angles, which is beneficial to reducing the processing difficulty. The protruding part of the flow guide arc surface can be flush with the inner side of the heat exchanger 3, so that there is no space with a sudden change in cross-section on the flow path of the high-temperature gas, ensuring a good guiding effect on the high-temperature gas.

[0075] Optionally, a plurality of mounting pieces 52 are spaced on the flow guide plate 51, and the mounting pieces 52 are fixedly connected to the connecting piece 2.

[0076] Specifically, mounting pieces 52 are provided on the top wall of the flow deflector 51, and the two can be of an integral structure. The mounting pieces 52 extend obliquely corresponding to the fixing parts of the connecting pieces 2. The side surfaces of the mounting pieces 52 are attached to the side surfaces of the fixing parts, and the two can be fixed by welding, clamping or bolt connection. In this embodiment, through holes are formed through each mounting piece 52, and a fastening bolt connected to the fixing part can be inserted into each through hole. The number of the mounting pieces 52 can be designed according to the actual length of the flow deflector 51, and the present invention does not make a limitation.

[0077] By providing a plurality of mounting pieces 52 to fixedly connect the upper side of the flow deflector 51 to the connecting piece 2, both the upper and lower sides of the flow deflector 51 are fixed, so as to improve the mounting stability of the flow deflector 51 and ensure that the flow deflector 51 will not shake during the flow of gas in the flow channel, thereby affecting the flow guiding effect.

[0078] Optionally, a plurality of reinforcing grooves 53 are spaced apart on the flow guiding arc surface.

[0079] Specifically, a heating groove is formed by the inward concavity of the flow guiding arc surface. The reinforcing grooves 53 extend in the vertical direction, and a plurality of reinforcing grooves 53 are equally spaced in the length direction of the flow deflector 51, so as to increase the structural strength of the flow deflector 51 and ensure that the strength of the flow deflector 51 after being heated still meets the requirements, and will not be deformed during the flow guiding process, so as to ensure the stability of the flow guiding effect.

[0080] Refer to Figure 6 , the gas water heater includes a casing 6 and the burner described above. The burner is arranged in the casing 6.

[0081] When the gas water heater is in use, the high-temperature gas in the burner can be smoothly guided to the heat exchanger 3, so as to ensure that the burner can operate continuously and stably for a long time, thereby effectively improving the combustion efficiency. At the same time, the internal air-cooling structure of the burner can effectively dissipate heat from the outer shell 1 of the burner, reducing the possibility of heat radiation outward through the outer shell 1. At the same time, the air-cooling can also bring the heat transferred to the outer shell 1 back to the burner, so as to improve the utilization rate of heat and is beneficial to improving the combustion efficiency of the burner.

[0082] Embodiment Two

[0083] On the basis of Embodiment One, the difference between this embodiment and Embodiment One lies in the different distribution of the flow guiding strips 12 on the outer shell 1.

[0084] Refer to Figure 7 , in the first direction, the distance between two adjacent flow guiding strips 12 decreases along the direction away from the edge of the side wall of the outer shell 1.

[0085] Specifically, the first direction intersects with the gas flow direction. In this embodiment, the first direction is perpendicular to the gas flow direction, that is, the first direction is the width direction of the side wall of the housing 1. On the side wall of the housing 1, at a position close to the edge of the side wall, the distance between two adjacent flow guiding strips 12 is larger, while at a position close to the middle of the side wall, the distance between two adjacent flow guiding strips 12 is smaller, so that a larger number of flow guiding strips 12 can be arranged at the middle position of the side wall, and a smaller number of flow guiding strips can be arranged at the edge position of the side wall. When the cold air enters the convection cavity, the non-uniform spacing distribution of the multiple flow guiding strips 12 can play a role in disturbing the flow, thereby reducing the air-cooling space in the middle of the side wall and increasing the air-cooling space at the edge of the side wall, so as to ensure the uniformity of the temperature rise on the surface of the burner and improve the air-cooling effect.

[0086] Embodiment III

[0087] Based on Embodiment I, the difference between this embodiment and Embodiment I lies in the distribution of the air inlets 11.

[0088] Referring to Figure 8 , optionally, air inlets 11 are provided on both the upper side and the lower side of the housing 1.

[0089] Specifically, providing air inlets 11 on both the upper side and the lower side of the housing 1 can effectively increase the communication area between the convection cavity and the external space, thereby effectively increasing the intake of cold air to meet the air-cooling requirements.

[0090] Optionally, the air inlet 11 includes a plurality of air inlet holes spaced apart along the second direction.

[0091] The second direction can be the width direction of the side wall of the housing 1, that is, the plurality of air inlet holes are spaced apart along the width direction of the side wall of the housing 1, so that the cold air can enter the convection cavity from the whole housing 1 according to requirements, thereby further improving the air-cooling effect.

[0092] Optionally, in the second direction, the distance between two adjacent air inlet holes increases in the direction away from the edge of the side wall of the housing 1.

[0093] Specifically, on the side wall of the housing 1, near the edge of the side wall, the distance between two adjacent air inlet holes is smaller, while near the middle of the side wall, the distance between two adjacent air inlet holes is larger, so that at the middle of the side wall, the number of air inlet holes is smaller and the density is lower, while at the edge of the side wall, the number of air inlet holes is larger and the density is higher, thereby making the intake of cold air at the edge of the side wall larger and the intake of cold air at the middle part smaller, so as to further optimize the flow mode of the cold air and make it better meet the air-cooling requirements.

[0094] Optionally, the number of air inlet holes on the upper side of the housing 1 is greater than the number of air inlet holes on the lower side of the housing 1.

[0095] Specifically, since there are more air inlet holes on the upper side of the outer shell 1, more cold air can flow into the outer shell 1 from the upper part, and then flow downward from the upper part of the outer shell 1, so that the cold air can more effectively dissipate heat from the outer shell 1, thereby further enhancing the air-cooling effect.

[0096] Optionally, a plurality of air inlet holes located on the lower side of the outer shell 1 are equally spaced.

[0097] Specifically, the equally spaced air inlet holes can allow cold air to flow evenly into the outer shell 1 from the lower part, so that this part of the cold air can fully contact the outer shell 1 and dissipate heat from the outer shell 1. Combined with the non-equally spaced air inlet holes on the upper side of the outer shell 1, efficient heat dissipation can be carried out on the parts of the outer shell 1 that are prone to rapid temperature rise, thus significantly improving the overall heat dissipation effect of the outer shell 1.

[0098] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A burner, characterized in that: include: A shell (1), wherein the top of the shell (1) is provided with a connecting piece (2), the connecting piece (2) extending upward along the gas flow direction, the connecting piece (2) extending obliquely toward the inside of the shell (1) on a side close to the shell (1) to form an installation space (21) outside the connecting piece (2), the installation space (21) being used for sealingly cooperating with a heat exchanger (3), and a guide space (22) being formed inside the connecting piece (2) to guide high-temperature gas into the heat exchanger (3); A heat insulation plate (4) is arranged on the inner wall of the outer shell (1); A flow guide (5) is arranged on a side of the heat insulation plate (4) close to the connecting plate (2); the flow guide (5) at least partially extends into the flow guide space (22) and has a flow guide arc surface for guiding high-temperature gas into the flow guide space (22).

2. The burner according to claim 1, characterized in that A convection cavity is formed between the outer shell (1) and the heat insulation board (4); the outer shell (1) has an air inlet (11) connected to the convection cavity; the heat insulation board (4) has an air outlet (41) connected to the convection cavity; the air inlet (11) and the air outlet (41) are staggered.

3. The burner according to claim 2, characterized in that The heat insulation board (4) comprises: A first heat insulation plate (42), a convection plate (43) is arranged between the first heat insulation plate (42) and the housing (1), a convection port (44) is opened through the convection plate (43), and the convection port (44) is staggered with the air inlet (11) and the air outlet (41).

4. The burner according to claim 3, characterized in that The air inlet (11) is opened on the upper side or the lower side of the shell (1), the air outlet (41) is opened on the upper side or the lower side of the first heat insulation board (42), and the convection port (44) is opened in the middle of the convection board (43).

5. The burner according to claim 2, characterized in that: The heat insulation board (4) comprises: A second heat insulation board (45), the air outlet (41) is opened in the middle of the second heat insulation board (45), and the air inlet (11) is opened on the upper side or the lower side of the outer shell (1).

6. The burner according to claim 2, characterized in that A plurality of guide bars (12) are protruded and spaced apart on the inner side wall of the outer shell (1), and the guide bars (12) extend along the gas flow direction.

7. The burner according to claim 6, characterized in that The guide strips (12) are distributed at equal intervals along the first direction; or In the first direction, the distance between two adjacent guide strips (12) decreases gradually in a direction away from the edge of the side wall of the housing (1).

8. The burner according to claim 2, characterized in that An extension direction of the air inlet (11) intersects with an extension direction of the air outlet (41).

9. The burner according to claim 2, characterized in that The air inlet (11) is provided on the upper side and the lower side of the housing (1).

10. The burner according to claim 2, characterized in that The air inlet (11) comprises a plurality of air inlet holes spaced apart and distributed along the second direction.

11. The burner according to claim 10, characterized in that In the second direction, the distance between two adjacent air inlet holes increases gradually in a direction away from the edge of the side wall of the housing (1).

12. The burner according to claim 10, characterized in that The number of the air inlet holes located on the upper side of the housing (1) is greater than the number of the air inlet holes located on the lower side of the housing (1).

13. The burner according to claim 10, characterized in that The plurality of air inlet holes located on the lower side of the housing (1) are distributed at equal intervals.

14. The burner according to any one of claims 1 to 13, characterized in that The flow guide (5) comprises: A flow guide plate (51), wherein the flow guide arc surface is arranged on a side of the flow guide plate (51) facing away from the housing (1).

15. The burner according to claim 14, characterized in that A plurality of mounting plates (52) are arranged at intervals on the guide plate (51), and the mounting plates (52) are fixedly connected to the connecting plate (2); and / or The guide arc surface is provided with a plurality of reinforcement grooves (53) at intervals; and / or The bending angle of the guide arc surface is between 30° and 80°.

16. A gas water heater, characterized in that: include: Housing (6); The burner according to any one of claims 1 to 15, arranged in the casing (6).

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