Combustion system and gas water heater

Abstract

The invention belongs to the technical field of kitchen appliances, and discloses a combustion system and a gas water heater. The combustion system comprises a fan, a heat exchanger and a combustor. One end of the heat exchanger communicates with a suction opening of the fan; the combustor is provided with a shell, the top of the shell is provided with a connecting piece, the connecting piece extends in the flowing direction of high-temperature gas, at least part of the connecting piece inclines towards the interior of the shell so as to form an installation space on the outer side of the connecting piece, and the other end of the heat exchanger is inserted into the installation space and matched with the connecting piece in a sealed mode. The inner sides of the connecting pieces are provided with flow guide spaces communicating with the heat exchanger so that high-temperature gas can be guided into the heat exchanger. Therefore, in the operation process of the combustion system, it can be ensured that high-temperature gas cannot leak, and the safety of the combustion system is effectively improved. And meanwhile, a water cooling structure such as a copper coil pipe with high manufacturing cost does not need to be configured to cool and dissipate heat of the shell, consumption of high-price materials such as copper materials is effectively reduced, and the cost of the combustion system is also effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and particularly to a combustion system 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 device.

[0003] In the existing technology, a heat exchanger is docked at the exhaust port of the burner, and a blower is provided on the heat exchanger. The blower can draw the high-temperature gas generated by the gas into the heat exchanger, and the high-temperature gas exchanges heat with the corresponding liquid in the heat exchanger so that the corresponding liquid reaches a specified temperature for user use.

[0004] However, with the continuous flow of the high-temperature gas, the connection between the burner and the heat exchanger is prone to deformation due to heat, resulting in the formation of gaps, which causes the high-temperature gas to leak and affects the safety of other components of the gas water heater. Moreover, when the high-temperature gas flows through spaces with different structures, it is easy to form eddies or dead zones, resulting in the high-temperature gas being easily retained in the burner for a long time. The surface temperature of the burner is likely to continue to rise, so a cooling structure needs to be configured for the burner, etc., at least increasing the overall cost of the burner. Summary of the Invention

[0005] The purpose of the present invention is to provide a combustion system and a gas water heater, which solve the problem that high-temperature gas is prone to leakage when the existing combustion system is in use, and also solve the problem that the overall cost increases due to the configuration of a cooling structure outside the burner to reduce the continuous rise of the surface temperature of the burner.

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

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

[0008] A blower;

[0009] A heat exchanger, one end of which is communicated with the air suction port of the blower;

[0010] A burner, the burner has a housing, the top of the housing has a connecting piece, the connecting piece extends along the flow direction of the high-temperature gas, and at least part of the connecting piece inclines towards the inside of the housing to form an installation space outside the connecting piece. The other end of the heat exchanger is inserted into the installation space and is in sealed cooperation with the connecting piece. The inner side of the connecting piece has a diversion space communicated with the heat exchanger to divert the high-temperature gas into the heat exchanger.

[0011] Optionally, a heat insulation plate is provided on the inner side wall of the housing. The housing has an air inlet, and the heat insulation plate has an air outlet that is misaligned with the air inlet.

[0012] Optionally, the heat insulation plate includes:

[0013] A first heat insulation plate, which is disposed opposite to and spaced apart from the inner side wall of the housing. A convection plate is provided between the first heat insulation plate and the housing. The convection plate has a convection opening, and the convection opening is misaligned with the air inlet and the air outlet.

[0014] Optionally, the convection opening is located in the middle of the convection plate. An air inlet is provided on the upper side or the lower side of the housing corresponding to the convection plate, and the air outlet is located on the upper side or the lower side of the first heat insulation plate.

[0015] Optionally, the heat insulation plate further includes:

[0016] A second heat insulation plate, the air outlet is provided in the middle of the second heat insulation plate, and an air inlet is provided on the upper side or the lower side of the housing corresponding to the second heat insulation plate.

[0017] Optionally, a plurality of flow guiding strips protrude from the side of the housing close to the heat insulation plate, and the flow guiding strips extend along the gas flow direction.

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

[0019] In the first direction, the distance between two adjacent flow guiding strips decreases along the direction away from the edge of the side wall of the housing.

[0020] Optionally, air inlets are provided on both the upper side and the lower side of the housing.

[0021] Optionally, the air inlet includes a plurality of air inlet holes spaced apart along a second direction.

[0022] 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 housing.

[0023] Optionally, the number of air inlet holes on the upper side of the housing is greater than the number of air inlet holes on the lower side of the housing.

[0024] Optionally, the plurality of air inlet holes on the lower side of the housing are equally spaced.

[0025] Optionally, the combustion system further includes:

[0026] A flow guiding member, which is disposed at the entrance of the flow guiding space and has a flow guiding arc surface for guiding high-temperature gas into the flow guiding space.

[0027] Optionally, the flow guide member includes:

[0028] A flow guide plate fixedly connected to the connecting piece, and the flow guide arc surface is disposed on a side of the flow guide plate facing away from the housing.

[0029] Optionally, a plurality of mounting pieces are spaced apart on the flow guide plate, and the mounting pieces are fixedly connected to the connecting piece.

[0030] Optionally, a plurality of reinforcing grooves are spaced apart on the flow guide arc surface; and / or

[0031] The bending angle of the flow guide arc surface is between 30° and 80°; and / or

[0032] The inner side wall of the housing has a heat insulation plate, and at least two of the heat insulation plates are respectively provided with one of the flow guide members.

[0033] In a second aspect, the present invention further provides a gas water heater, which includes:

[0034] A casing;

[0035] The combustion system according to any one of the first aspect, disposed in the casing.

[0036] Advantages of the present invention:

[0037] In the first aspect, by providing a connecting piece to connect the housing and the heat exchanger, the installation space enables the two to form a sealed fit, ensuring that there is sufficient contact area at the connection. Then, when the blower is in operation, the high-temperature gas generated in the burner is extracted, and a one-way flow path for the high-temperature gas is formed among the burner, the heat exchanger, and the blower. When the high-temperature gas continuously passes through the connecting piece, even if the connecting piece is deformed due to heat, since the installation space is formed, the deformation is always within the heat exchanger, and there will be no gap between the heat exchanger and the housing, so the sealing effect between the heat exchanger and the burner will not be affected. Then, the high-temperature gas is guided into the heat exchanger through the flow guide space. The flow guide space uses the inclined side wall of the connecting piece to guide the high-temperature gas, so that the high-temperature gas gradually enters the interior of the heat exchanger along the inclined side wall, reducing the possibility of the high-temperature gas accumulating in the housing, and thus effectively alleviating the possibility of the surface temperature of the housing continuously rising.

[0038] Therefore, during the operation of the combustion system, a sealed fit is formed with the heat exchanger through the installation space formed outside the connecting piece. At this time, even if the connecting piece deforms due to heat, it can still maintain a sealed connection with the heat exchanger, ensuring that high-temperature gas does not leak, effectively improving the safety of the combustion system. At the same time, the setting of the diversion space can play a guiding effect on the flow of high-temperature gas, reducing the possibility of vortex or dead zone occurring at the connection due to sudden cross-sectional change. On the one hand, it effectively ensures that the high-temperature gas smoothly flows into the heat exchanger for heat exchange. On the other hand, it can also reduce the possibility of the high-temperature gas accumulating and causing the temperature of the outer shell to continue to rise. Then, there is no need to configure expensive water-cooling structures such as copper coils to cool and dissipate heat from the outer shell, thus effectively reducing the consumption of high-cost materials such as copper and also effectively reducing the cost of the combustion system.

[0039] Secondly, when the gas water heater is in use, the high-temperature gas in the burner can be smoothly diverted 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 inside of the burner can also use an air-cooling structure to effectively dissipate heat from the outer shell of the burner, reducing the possibility of heat radiation from the outer shell. At the same time, there is no need to configure a water-cooling structure, which can effectively reduce the consumption of relatively expensive copper materials, etc., and further reduce the manufacturing cost of the gas water heater. Description of the Drawings

[0040] Figure 1 is a schematic structural diagram of the combustion system in Embodiment 1 of the present invention;

[0041] Figure 2 is a schematic structural diagram of the burner of the combustion system in Embodiment 1 of the present invention;

[0042] Figure 3 is a front structural sectional view of the burner of the combustion system in Embodiment 1 of the present invention;

[0043] Figure 4 is a side structural sectional view of the burner of the combustion system in Embodiment 1 of the present invention;

[0044] Figure 5 is an exploded structural diagram of the burner of the combustion system in Embodiment 1 of the present invention;

[0045] Figure 6 is a schematic internal structural diagram of the burner of the combustion system in Embodiment 1 of the present invention;

[0046] Figure 7 is a schematic structural diagram of the combustion water heater in Embodiment 1 of the present invention;

[0047] Figure 8 is a schematic structural diagram of the burner of the combustion system in Embodiment 2 of the present invention;

[0048] Figure 9 It is a schematic structural diagram of the burner of the combustion system in the third embodiment of the present invention.

[0049] In the figure:

[0050] 1. Blower; 2. Heat exchanger; 3. Burner; 31. Outer shell; 311. Air inlet; 312. Flow guide strip; 32. Heat insulation plate; 321. First heat insulation plate; 322. Second heat insulation plate; 323. Air outlet; 4. Connecting piece; 41. Installation space; 42. Flow guide space; 5. Flow guide member; 51. Flow guide plate; 52. Installation piece; 53. Reinforcing groove; 6. Machine shell; 7. Convection plate; 71. Convection port. Specific embodiments

[0051] 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. In addition, 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 the structures.

[0052] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected" 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 internal communication of 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 situations.

[0053] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0054] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it 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.

[0055] An embodiment of the present invention discloses a combustion system and a gas water heater.

[0056] Embodiment 1

[0057] Referring to Figures 1 to 6 , the combustion system includes a blower 1, a heat exchanger 2, and a burner 3; one end of the heat exchanger 2 is communicated with the air suction port of the blower 1; the burner 3 has a housing 31, and a connecting piece 4 is provided at the top of the housing 31. The connecting piece 4 extends along the flow direction of the high-temperature gas, and at least part of the connecting piece 4 inclines towards the inside of the housing 31 to form an installation space 41 outside the connecting piece 4. The other end of the heat exchanger 2 is inserted into the installation space 41 and is in sealing cooperation with the connecting piece 4. A diversion space 42 communicated with the heat exchanger 2 is provided inside the connecting piece 4 to divert the high-temperature gas into the heat exchanger 2.

[0058] Specifically, the upper end of the blower 1 is the air exhaust port, and the lower end is set as the air suction port. The upper end of the heat exchanger 2 is provided with an exhaust port, and the exhaust port and the air suction port are inserted and matched with each other to form a sealed communication. The lower end of the heat exchanger 2 is provided with a communication port, and the communication port can form an insertion fit with the connecting piece 4.

[0059] The connecting piece 4 is arranged around the circumference of the housing 31. The connecting piece 4 includes an integral fixing part and a connecting part. The lower side of the fixing part is fixedly connected to the housing 31, and the upper side inclines and extends towards the inside of the housing 31. The connecting part is located on the side of the fixing part away from the housing 31. The connecting part can extend vertically upwards, or can continue to incline and extend towards the inside of the housing 31, or can incline and extend towards the outside of the housing 31. A corresponding installation space 41 is formed outside the connecting piece 4 to be adapted to the heat exchanger 2. The installation space 41 can be adapted to the communication port, and the communication port can be inserted into the installation space 41 and form a sealed fit with the housing 31. Multiple connection positions can be formed at the insertion part so that the connection part can form a tight fit to achieve sealing. The connection part can be fixedly connected by bolts or can be fixedly connected by spot welding. The inclined extension of the connecting piece 4 can also form a diversion space 42 inside the connecting piece 4. The cross-sectional area of the diversion space 42 is gradually changing, and the inclination amplitude of the connecting piece 4 can be adapted to the inner wall of the heat exchanger 2, so that the high-temperature gas can smoothly enter the inside of the heat exchanger 2 under the guiding action of the diversion space 42.

[0060] By setting the connecting piece 4 to connect the outer shell 31 and the heat exchanger 2, the installation space 41 enables the two to form a sealed fit, ensuring that there is sufficient contact area at the connection. Then, when the blower 1 is running, the high-temperature gas generated in the burner 3 is extracted, and a one-way flow path for the high-temperature gas is formed among the burner 3, the heat exchanger 2, and the blower 1. When the high-temperature gas continuously passes through the connecting piece 4, even if the connecting piece 4 deforms due to heat, since the installation space 41 is formed, this deformation is always within the heat exchanger 2, and no gap will be generated between the heat exchanger 2 and the outer shell 31, so the sealing effect between the heat exchanger 2 and the burner 3 will not be affected. Then, the high-temperature gas is guided into the heat exchanger 2 through the diversion space 42. The diversion space 42 uses the inclined side wall of the connecting piece 4 to guide the high-temperature gas, so that the high-temperature gas gradually enters the interior of the heat exchanger 2 along the inclined side wall, reducing the possibility of the high-temperature gas accumulating in the outer shell 31, thereby effectively alleviating the possibility of the surface temperature of the outer shell 31 continuously rising.

[0061] Therefore, during the operation of this combustion system, a sealed fit is formed with the heat exchanger 2 through the installation space 41 formed outside the connecting piece 4. At this time, even if the connecting piece 4 deforms due to heat, it can still maintain a sealed connection with the heat exchanger 2, ensuring that the high-temperature gas will not leak, effectively improving the safety of this combustion system. At the same time, the setting of the diversion space 42 can guide the flow of the high-temperature gas, reducing the possibility that the high-temperature gas will generate eddy currents or dead zones due to sudden changes in cross-section at the connection. On the one hand, it effectively ensures that the high-temperature gas smoothly flows into the heat exchanger 2 for heat exchange. On the other hand, it can also reduce the possibility that the high-temperature gas accumulates and causes the temperature of the outer shell 31 to continuously rise. Then, there is no need to configure expensive water-cooling structures such as copper coils to cool and dissipate heat from the outer shell 31, thereby effectively reducing the consumption of high-cost materials such as copper and effectively reducing the cost of this combustion system.

[0062] Optionally, a heat insulation plate 32 is provided on the inner side wall of the outer shell 31. The outer shell 31 has an air inlet 311, and the heat insulation plate 32 has an air outlet 323 that is misaligned with the air inlet 311.

[0063] Specifically, the heat insulation plate 32 is made of a material with a relatively low thermal conductivity. It can be spaced from the outer shell 31 to form a convection cavity therebetween. An air inlet 311 is provided on the outer shell 31. The air inlet 311 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 31, or in the middle of the outer shell 31. An air outlet 323 is provided on the heat insulation plate 32. The air outlet 323 can also be composed of a plurality of long strip-shaped through holes, and it is staggeredly distributed with the air inlet 311. That is, when the air inlet 311 is located on the upper side or the lower side of the outer shell 31, the air outlet 323 is located in the middle of the heat insulation plate 32. Conversely, when the air inlet 311 is located in the middle of the outer shell 31, the air outlet 323 is located on the upper side or the lower side of the heat insulation plate 32. It should be understood that it is only necessary that the air inlet 311 and the air outlet 323 are staggeredly distributed, and the specific relative positions of the two can be designed according to the actual size of the convection cavity.

[0064] By providing the heat insulation plate 32, heat transfer to the outer shell 31 can be further blocked. While the high-temperature gas flows towards the heat exchanger 2, the external air will also be drawn into the convection cavity by the fan 1 through the air inlet 311. 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 323 is staggeredly distributed with the air inlet 311, the wind-cooled gas will directly come into full contact with the heat insulation plate 32 after entering the convection cavity, and then flow into the inner side of the heat insulation plate 32 through the air outlet 323 and enter the heat exchanger 2 together with the high-temperature gas. In this way, the wind-cooled air is used to dissipate heat from the heat insulation plate 32, reducing the temperature of the heat insulation plate 32 itself. At the same time, due to the staggered distribution of the air inlet 311 and the air outlet 323, 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 31, reducing the possibility of the temperature of the outer shell 31 continuously rising. Moreover, after the wind-cooled gas exchanges heat with the heat insulation plate 32 and then enters the heat insulation plate 32, it can bring the heat transferred to the heat insulation plate 32 and the outer shell 31 back into the inner side of the heat insulation plate 32 and enter the heat exchanger 2 together with the original high-temperature gas for heat exchange, thereby further improving the utilization rate of heat, reducing heat damage, and effectively improving the efficiency of the burner 3. At the same time, the wind cooling can further ensure that the temperature of the outer shell 31 of the burner 3 does not exceed the requirement even when it operates under a high load state, and there is no need to set up a water cooling structure, thereby reducing the cost of the burner 3 and not affecting the operation of the burner 3 under a high load state.

[0065] Optionally, the heat insulation plate 32 includes a first heat insulation plate 321. The first heat insulation plate 321 is relatively spaced from the inner side wall of the outer shell 31. A convection plate 7 is provided between the first heat insulation plate 321 and the outer shell 31. The convection plate 7 has a convection opening 71, and the convection opening 71 is staggeredly distributed with the air inlet 311 and the air outlet 323.

[0066] Specifically, the heat insulation plates 32 provided on the front and rear sides of the outer shell 31 are the first heat insulation plates 321. The convection plate 7 is erected in the convection cavity to divide the convection cavity into two parts. A convection port 71 is formed through the convection plate 7. The convection port 71 can also be composed of a plurality of long strip-shaped through holes. The convection port 71, the air inlet 311, and the air outlet 323 are all misaligned, that is, the three will not be directly connected.

[0067] By providing the convection plate 7, when the air-cooled gas enters through the air inlet 311, the air-cooled gas will first contact the convection plate 7 and flow through the convection port 71 to the heat insulation plate 32, and then enter the inner side of the heat insulation plate 32 through the air outlet 323 after contacting the heat insulation plate 32. In this way, the flow path of the air-cooled gas in the convection cavity is extended, thereby improving the heat insulation effect. And because the convection port 71, the air inlet 311, and the air outlet 323 are all misaligned, the air-cooled gas can form at least two layers of air curtains in the convection cavity, further improving the blocking effect on heat radiation. Thus, the rate of heat transfer from the burner 3 to the outer shell 31 under high load conditions can be effectively reduced, and further ensure that the temperature of the outer shell 31 can be maintained within a safe range.

[0068] Optionally, the convection port 71 is located in the middle of the convection plate 7, and the air inlet 311 is provided on the upper side or the lower side of the outer shell 31 corresponding to the convection plate 7, and the air outlet 323 is located on the upper side or the lower side of the first heat insulation plate 321.

[0069] Specifically, air outlets 323 can be provided on both the upper side and the lower side of the first heat insulation plate 321, and air inlets 311 can also be provided on both the upper side and the lower side of the outer shell 31 corresponding to the first heat insulation plate 321. The convection port 71 is provided in the middle of the convection plate 7, so that the air-cooled gas will gather in the middle of the convection plate 7 to form an air curtain after entering through the air inlet 311, and then flow through the convection port 71 to the first heat insulation plate 321, and then disperse to flow to the air outlets 323 on the upper side and the lower side of the first heat insulation plate 321 respectively, thereby forming another air curtain.

[0070] Optionally, the heat insulation plate 32 further includes a second heat insulation plate 322. The air outlet 323 is provided in the middle of the second heat insulation plate 322, and the air inlet 311 is provided on the upper side or the lower side of the outer shell 31 corresponding to the second heat insulation plate 322.

[0071] Specifically, the heat insulation plates 32 provided on the left and right sides of the outer shell 31 are the second heat insulation plates 322. The air outlet 323 of the second heat insulation plate 322 is located in the middle, and air inlets 311 can be provided on both the upper side and the lower side of the outer shell 31 corresponding to the second heat insulation plate 322, so that the air-cooled gas will gather towards the middle of the second heat insulation plate 322 to form an air curtain after entering the air inlet 311, and then flow into the inner side of the second heat insulation plate 322 through the air outlet 323.

[0072] In this embodiment, based on the fact that the high-temperature gas is relatively more concentrated on the front and rear sides of the housing 31, while there is less high-temperature gas on the left and right sides, the heat insulation plates 32 on the front and rear sides of the housing 31 are set as the first heat insulation plates 321, and the heat insulation plates 32 on the left and right sides of the housing 31 are set as the second heat insulation plates 322. It should be understood that the specific distribution of the first heat insulation plates 321 and the second heat insulation plates 322 can be designed according to the actual structure of the burner 3. All the heat insulation plates 32 can be set as the first heat insulation plates 321, or all can be set as the second heat insulation plates 322.

[0073] Optionally, a plurality of flow guiding strips 312 are convexly provided at intervals on the inner side wall of the housing 31, and the flow guiding strips 312 extend along the gas flow direction.

[0074] Specifically, the inner side wall of the housing 31 bulges inward to form the flow guiding strips 312. The flow guiding strips 312 extend vertically. The side surfaces of the flow guiding strips 312 can be in contact with the convection plate 7 or the heat insulation plates 32, or can be not in contact. The plurality of flow guiding strips 312 are equally spaced along the first direction. The first direction can intersect with the gas flow direction. In this embodiment, the first direction is perpendicular to the gas flow direction. By providing the flow guiding strips 312, 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 setting of the flow guiding strips 312 can also improve the strength of the housing 31.

[0075] Optionally, the extending direction of the air inlet 311 intersects with the extending direction of the air outlet 323.

[0076] Specifically, the through holes included in the air inlet 311 all extend along the vertical direction, and the through holes included in the air outlet 323 all extend along the horizontal direction. It is also possible to extend the through holes included in the air inlet 311 along the horizontal direction, and the through holes included in the air outlet 323 extend along the vertical direction. In this way, the convection effect of the air-cooled gas during the flowing process can be further improved, and it is ensured that the air-cooled gas can uniformly flow into the heat insulation plates 32 through the air outlet 323.

[0077] Optionally, the combustion system further includes a flow guiding member 5. The flow guiding member 5 is arranged at the entrance of the flow guiding space 42 and has a flow guiding arc surface for guiding the high-temperature gas into the flow guiding space 42.

[0078] Specifically, the flow guiding member 5 can be directly fixed on the fixing part, or can be fixed on the housing 31 or the heat insulation plates 32. It extends along the gas flow direction, and the side of the flow guiding member 5 close to the high-temperature gas is convex in an arc shape to form a flow guiding arc surface. The protruding amplitude of the flow guiding arc surface can be flush with the connecting part and the inner wall of the heat exchanger 2.

[0079] By providing the flow guide member 5, when the high-temperature gas approaches the flow guide space 42, it will be limited to contact with the flow guide arc surface and gradually flow into the interior of the flow guide space 42 under the guiding action of the flow guide arc surface, so that there is no space with a sudden cross-section change in the flow direction of the high-temperature gas, which is beneficial to improving the smoothness of the high-temperature gas flow and reducing the possibility of vortex or dead zone occurrence.

[0080] Optionally, the flow guide member 5 is provided on the heat insulation plate 32, and the cross-section of the outer shell 31 is rectangular, and heat insulation plates 32 are provided on all four side walls thereof, and a flow guide member 5 is respectively provided on at least two heat insulation plates 32. In this embodiment, the flow guide member 5 is provided on the first heat insulation plate 321, and the flow guide member 5 and the first heat insulation plate 321 are of an integral structure. The high-temperature gas close to the first heat insulation plate 321 can be guided by the flow guide arc surface during the flow process. The specific number and position of the flow guide member 5 can be designed according to the actual distribution of the high-temperature gas in the burner 3, and the present invention does not limit this.

[0081] Optionally, the flow guide member 5 includes a flow guide plate 51. The flow guide plate 51 is fixedly connected to the connecting piece 4, and the flow guide arc surface is provided on the side of the flow guide plate 51 facing away from the outer shell 31.

[0082] Specifically, the flow guide plate 51 is integrally bent inward to form the above-mentioned flow guide arc surface, and its bending amplitude can be designed according to the actual space, and the present invention does not limit this. In this embodiment, the bending angle of the flow guide arc surface is between 30° and 80°, and the specific bending radian can be designed according to the actual installation space 41, and the present invention does not limit this.

[0083] 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 2, so that there is no space with a sudden cross-section change in the flow path of the high-temperature gas, ensuring a good guiding effect on the high-temperature gas.

[0084] Optionally, a plurality of mounting pieces 52 are arranged at intervals on the flow guide plate 51, and the mounting pieces 52 are fixedly connected to the connecting piece 4.

[0085] Specifically, the mounting pieces 52 are provided on the top wall of the flow guide plate 51, and the two can be of an integral structure. The fixing parts of the mounting pieces 52 extend obliquely corresponding to the connecting piece 4, and 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, a connecting hole is penetrated through each mounting piece 52, and a fastening bolt connected to the fixing part can be inserted into each connecting hole. The number of the mounting pieces 52 can be designed according to the actual length of the flow guide plate 51, and the present invention does not limit this.

[0086] By setting a plurality of mounting pieces 52, the upper side of the deflector 51 is fixedly connected to the connecting piece 4, so that both the upper and lower sides of the deflector 51 are fixed, thereby improving the mounting stability of the deflector 51 and ensuring that the deflector 51 does not shake during the gas flow in the flow channel, which may affect the deflector effect.

[0087] Optionally, a plurality of reinforcing grooves 53 are spaced apart on the deflector arc surface.

[0088] Specifically, a heating groove is formed by the inward concavity of the deflector 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 deflector 51, so as to increase the structural strength of the deflector 51 and ensure that the strength of the deflector 51 after being heated still meets the requirements, and the deflector 51 will not be deformed during the deflector process, so as to ensure the stability of the deflector effect.

[0089] Refer to Figure 7 As shown in the figure, the gas water heater includes a casing 6 and a combustion system as described above. The combustion system is arranged in the casing 6.

[0090] When the gas water heater is in use, the high-temperature gas in the burner 3 can be smoothly deflected into the heat exchanger 2, so as to ensure that the burner 3 can operate continuously and stably for a long time, thereby effectively improving the combustion efficiency. At the same time, the inside of the burner 3 can also use an air-cooling structure to effectively dissipate heat from the outer shell 31 of the burner 3, reducing the possibility of heat radiation outward through the outer shell 31. At the same time, there is no need to configure a water-cooling structure, which can effectively reduce the consumption of expensive copper materials, etc., and thus reduce the manufacturing cost of the gas water heater.

[0091] Embodiment Two

[0092] On the basis of Embodiment One, the difference between this embodiment and Embodiment One lies in the different distribution of the deflector strips on the outer shell 31.

[0093] Refer to Figure 8 As shown in the figure, in the first direction, the distance between two adjacent deflector strips 312 decreases in the direction away from the edge of the side wall of the outer shell 31.

[0094] Specifically, the first direction intersects 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 31. On the side wall of the housing 31, at a position close to the edge of the side wall, the distance between two adjacent flow guiding strips 312 is larger, while at a position close to the middle of the side wall, the distance between two adjacent flow guiding strips 312 is smaller, so that a larger number of flow guiding strips 312 can be arranged at the middle position of the side wall, and a smaller number of flow guiding strips 312 can be arranged at the edge position of the side wall. When the air-cooled cold air enters the convection chamber, the non-uniform spacing distribution of the multiple flow guiding strips 312 can play a role in disturbing the flow, thereby reducing the air-cooled space in the middle of the side wall and increasing the air-cooled space at the edge of the side wall to ensure the uniformity of the surface temperature rise of the housing 31 and improve the air-cooling effect.

[0095] Embodiment III

[0096] Based on Embodiment I, the difference between this embodiment and Embodiment I lies in the different distributions of the air inlets 311.

[0097] Referring to Figure 9 , optionally, air inlets 311 are provided on both the upper side and the lower side of the housing 31.

[0098] Specifically, by providing air inlets 311 on both the upper side and the lower side of the housing 31, the communication area between the convection chamber and the external space can be effectively increased, thereby effectively increasing the intake of air-cooled cold air to meet the requirements of air cooling.

[0099] Optionally, the air inlet 311 includes a plurality of air inlet holes spaced apart along the second direction.

[0100] The second direction can be the width direction of the side wall of the housing, that is, the plurality of air inlet holes are spaced apart along the width direction of the side wall of the housing, so that the air-cooled cold air can enter the inside of the convection chamber from the whole housing 31 according to the needs, thereby further improving the air-cooling effect.

[0101] 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 31.

[0102] Specifically, on the side wall of the housing 31, 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 the number of air inlet holes and the density are smaller in the middle of the side wall, and the number of air inlet holes and the density are larger at the edge of the side wall, so that the intake of air-cooled cold air is larger at the edge of the side wall and smaller in the middle part, so as to further optimize the flow mode of the air-cooled cold air and make it better meet the requirements of air cooling.

[0103] Optionally, the number of air inlet holes located on the upper side of the housing 31 is greater than the number of air inlet holes located on the lower side of the housing 31.

[0104] Specifically, if there are more air inlet holes on the upper side of the housing 31, then the cold air can flow into the housing 31 more from the upper part, and then flow downward from the upper part of the housing 31, so that the cold air can more effectively dissipate heat from the housing 31, thereby further enhancing the air cooling effect.

[0105] Optionally, a plurality of air inlet holes located on the lower side of the housing 31 are equally spaced.

[0106] Specifically, the plurality of equally spaced air inlet holes can enable the cold air to flow into the housing 31 evenly from the lower part, so that the part of the cold air can fully contact the housing 31 and dissipate heat from the housing 31 sufficiently. Combined with the plurality of non-equally spaced air inlet holes on the upper side of the housing 31, efficient heat dissipation can be carried out on the parts of the housing 31 that are prone to rapid temperature rise, thus significantly improving the overall heat dissipation effect of the housing 31.

[0107] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on 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 combustion system, characterized in that: include: Fan (1); A heat exchanger (2), one end of which is connected to the air outlet of the fan (1); A burner (3), the burner (3) having an outer shell (31), the top of the outer shell (31) having a connecting piece (4), the connecting piece (4) extending along the flow direction of the high-temperature gas, and at least a portion of the connecting piece (4) tilting inwardly of the outer shell (31) to form an installation space (41) outside the connecting piece (4), the other end of the heat exchanger (2) being plugged into the installation space (41) and sealingly matched with the connecting piece (4), the inner side of the connecting piece (4) having a guide space (42) connected to the heat exchanger (2) to guide the high-temperature gas into the heat exchanger (2).

2. The combustion system according to claim 1, characterized in that: The inner side wall of the outer shell (31) is provided with a heat insulation board (32); the outer shell (31) has an air inlet (311); and the heat insulation board (32) has an air outlet (323) that is staggered with the air inlet (311).

3. The combustion system according to claim 2, characterized in that: The heat insulation board (32) comprises: A first heat insulation plate (321) is arranged relative to the inner wall of the outer shell (31) at a distance therefrom, and a convection plate (7) is arranged between the first heat insulation plate (321) and the outer shell (31), the convection plate (7) having a convection port (71), and the convection port (71) is staggered with the air inlet (311) and the air outlet (323).

4. The combustion system according to claim 3, characterized in that: The convection port (71) is located in the middle of the convection plate (7), the air inlet (311) is provided on the upper side or the lower side of the shell (31) corresponding to the convection plate (7), and the air outlet (323) is located on the upper side or the lower side of the first heat insulation plate (321).

5. The combustion system according to claim 2, characterized in that: The heat insulation board (32) further comprises: A second heat insulation board (322), the air outlet (323) is provided in the middle of the second heat insulation board (322), and the air inlet (311) is provided on the upper side or the lower side of the shell (31) corresponding to the second heat insulation board (322).

6. The combustion system according to claim 2, characterized in that: A plurality of guide bars (312) are protrudingly provided on one side of the shell (31) close to the heat insulation plate (32), and the guide bars (312) extend along the gas flow direction.

7. The combustion system according to claim 6, characterized in that: The guide strips (312) are distributed at equal intervals along the first direction; or In the first direction, the distance between two adjacent guide bars (312) decreases in a direction away from the edge of the side wall of the housing (31).

8. The combustion system according to claim 2, characterized in that: The air inlet (311) is provided on the upper side and the lower side of the shell (31).

9. The combustion system according to claim 2, characterized in that: The air inlet (311) comprises a plurality of air inlet holes spaced apart and distributed along the second direction.

10. The combustion system according to claim 9, 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 outer shell (31).

11. The combustion system according to claim 9, characterized in that: The number of the air inlet holes located on the upper side of the shell (31) is greater than the number of the air inlet holes located on the lower side of the shell (31).

12. The combustion system according to claim 9, characterized in that: The plurality of air inlet holes located on the lower side of the housing (31) are distributed at equal intervals.

13. The combustion system according to any one of claims 1 to 12, characterized in that: The combustion system further comprises: The flow guide member (5) is arranged at the entrance of the flow guide space (42) and has a flow guide arc surface for guiding high-temperature gas into the flow guide space (42).

14. The combustion system according to claim 13, characterized in that: The flow guide (5) comprises: The guide plate (51) is fixedly connected to the connecting piece (4), and the guide arc surface is arranged on a side of the guide plate (51) facing away from the outer shell (31).

15. The combustion system 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 plates (4).

16. The combustion system according to claim 13, characterized in that: The guide arc surface is provided with a plurality of reinforcement grooves (53) at intervals; and / or The curvature angle of the guide arc surface is between 30° and 80°; and / or The inner side wall of the outer shell (31) has a heat insulation board (32), and one flow guide member (5) is respectively arranged on at least two of the heat insulation boards (32).

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

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