A flow channel system, combustion heat exchange component and gas water heater

Abstract

The present invention relates to the field of household electrical appliance technology, and more specifically to a flow channel system, a combustion heat exchange component and a gas water heater, wherein the flow channel system includes a primary air port and a secondary air port; the primary air port is connected to an air inlet through a first circulation channel; the secondary air port is simultaneously connected to an exhaust channel and a top wall plate; a secondary air shield is covered on the secondary air port, and the secondary air shield is provided with an air inlet for air to flow in, and the air inlet is connected to the top wall plate in a positional manner; a spoiler is arranged in the circulation channel from the air inlet to the exhaust channel to match the exhaust channel, and there is a gap between the first end of the spoiler and the top wall plate, and the gap allows the airflow from the air inlet to the top wall plate to flow into the exhaust channel without passing the spoiler. The preferred flow channel system of the present invention improves the overall combustion heat exchange effect by optimizing the air inlet structure of the secondary air port and balancing the uniformity of the air intake of the fan assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and more particularly to a flow channel system, a combustion heat exchange component and a gas water heater. Background Art

[0002] Gas water heaters are currently the most convenient and economical devices for quickly heating water. They have high energy conversion efficiency. Compared with electric water heaters, gas water heaters are more energy-efficient and more in line with the "dual carbon" requirements.

[0003] Among them, as attached below Figure 2 The combustion heat exchange assembly shown is the main component of the gas water heater, generally composed of a combustion heat exchange system and a gas supply assembly, and the combustion heat exchange system includes a fan assembly, a heat exchange assembly and a burner assembly. For the upper exhaust type combustion heat exchange system, the fan assembly is placed above the burner assembly, and the burner assembly and the fan assembly are connected through the heat exchange assembly. When working, the burner assembly receives the gas ejected from the nozzle of the gas supply assembly (including the transport pipeline, gas distributor, etc.) and burns it. The high-temperature flue gas after combustion flows out of the burner assembly under the suction of the fan assembly, flows through the heat exchange assembly and realizes heat exchange with the water to be heated, and then flows to the fan assembly and is discharged. In addition to draining the high-temperature flue gas after combustion, the fan assembly also drives external air from the gas feed port and the air ports at other positions into the burner assembly to provide sufficient oxygen for the combustion of the gas.

[0004] However, in actual use, it was found that the above system had a problem of poor combustion and heat exchange effect. Summary of the invention

[0005] The purpose of the present invention is to address the shortcomings of the prior art and provide a flow channel system mainly used to guide the flow of gas in a combustion and heat exchange component having a burner and a fan assembly, so as to improve the overall combustion and heat exchange effect by optimizing the air inlet structure of the secondary air port and balancing the uniformity of the air intake of the fan assembly.

[0006] On the basis of the above, a second object of the present invention is to provide a combustion heat exchange component having the above-mentioned flow channel system.

[0007] On the basis of the above, the third object of the present invention is to provide a gas water heater having the above-mentioned flow channel system or the above-mentioned combustion heat exchange component.

[0008] The technical solutions of the present invention are as follows:

[0009] A flow channel system guides gas flow in a combustion heat exchange component having a burner and a fan component, the flow channel system comprising:

[0010] A primary air port is provided on the burner for the combustion gas to flow into;

[0011] A secondary air port, for combustion air to flow into, is provided in the burner;

[0012] An air inlet, which is simultaneously connected to an exhaust passage and a top wall plate disposed on one side of the exhaust passage, wherein the exhaust passage is connected to a fan for exhaust;

[0013] The primary air port is connected to the air inlet through a first flow channel flowing through the combustion zone and the heat exchange zone;

[0014] The secondary air port is sequentially connected to the exhaust channel and the top wall plate through the second flow channel that flows through the combustion zone and the heat exchange zone, and the air inlet;

[0015] A secondary wind shield is installed on the secondary air port to block air circulation, and the secondary wind shield is provided with an air inlet for air to flow in, and the air inlet is in communication with the top wall plate;

[0016] A spoiler assembly comprises a spoiler plate adapted to the exhaust channel and arranged in the flow channel from the air inlet to the exhaust channel, and a gap is provided between the first end of the spoiler plate and the top wall plate, and the gap allows at least part of the airflow flowing from the air inlet to the top wall plate to flow into the exhaust channel bypassing the spoiler plate.

[0017] The above scheme is for the following Figure 2 Starting from the combustion and heat exchange assembly shown, due to the space limitation of the combustion and heat exchange assembly, a recessed setting is required on the smoke hood shell to free up installation space for the fan, thereby forming a top wall plate located on one side of the exhaust channel intersecting with the exhaust direction.

[0018] The poor combustion heat exchange effect caused by the above settings appears in two aspects:

[0019] First, the secondary air port is connected to the exhaust channel and the top wall at the same time. As a result, the part where the secondary air port is connected to the exhaust channel can smoothly introduce sufficient air from the outside for combustion, while the part where the secondary air port is connected to the top wall is blocked by the top wall, which easily leads to the inability to smoothly introduce sufficient air from the outside for combustion, and then the air for combustion is unevenly distributed in the burner, resulting in uneven combustion of gas in the burner, and thus unable to achieve uniform heat exchange; especially when the amount of air introduced is small, it is also easy to cause incomplete combustion of gas in some areas and produce toxic gases such as carbon monoxide.

[0020] Secondly, under the driving action of the fan, the gas can flow in and out smoothly in the part where the air inlet is opposite to the exhaust channel; the airflow introduced in the part where the air inlet is opposite to the top wall plate is blocked by the top wall plate, and the speed of gas inflow will be greatly slowed down; this causes the fan component to have uneven drainage problems, and thus makes it impossible for the airflow to flow evenly in the combustion heat exchange component, and it is impossible to achieve uniform heat exchange.

[0021] Based on the above two factors, in the solution of the present invention:

[0022] On the one hand, a secondary wind shield is set to block the air from flowing through the secondary air port, and an air inlet hole for air flow is provided on the secondary wind shield, the air inlet hole is connected to the top wall plate in an aligned manner, and the air inlet hole is staggered with the exhaust channel; in this way, all the air is driven to flow into the burner from the portion of the secondary air port that is connected to the top wall plate in an aligned manner, and then the fan draws part of the air sucked in from the air inlet hole through the exhaust channel to the portion that is connected to the secondary air port and the exhaust channel, which can increase the air flow rate of the portion that is connected to the top wall plate in an aligned manner to a certain extent, reduce the air flow rate of the portion that is connected to the exhaust channel, and make the air flow distribution in the burner more uniform, so as to improve the uniformity of gas combustion in the burner.

[0023] On the other hand, a spoiler is added, which is adapted to the exhaust channel and arranged in the flow channel from the air inlet to the exhaust channel, and there is a gap between the first end of the spoiler and the top wall plate for the airflow flowing from the air inlet to the top wall plate to avoid the spoiler and flow into the exhaust channel, thereby reducing the flow rate of the intake airflow in the relative parts of the air inlet and the exhaust channel without affecting the intake airflow in the relative parts of the air inlet and the top wall plate as much as possible, thereby achieving the uniformity of the overall intake of the balanced fan assembly; and then the fan assembly can more evenly absorb the gas in the combustion heat exchange assembly, thereby improving the uniformity of the flow of the gas in the combustion heat exchange assembly, and optimizing the overall heat exchange effect.

[0024] This can be achieved by optimizing the air intake structure of the secondary air port and balancing the uniformity of the air intake of the fan assembly to improve the uniformity of the overall combustion heat exchange and improve the overall combustion heat exchange effect.

[0025] As a further preferred solution, the spoiler is provided with a plurality of spoiler holes for allowing gas to flow from the air inlet to the exhaust channel.

[0026] As a further preferred solution, the secondary wind deflector cover is installed on the air intake side of the secondary air port.

[0027] As a further preferred solution, the secondary air shield is installed on the burner housing of the burner.

[0028] As a further preferred solution, the secondary air shield is fixed to the burner housing via a plurality of connectors.

[0029] As a further preferred solution, the secondary wind shield has a plurality of mounting holes for the connecting parts to pass through.

[0030] As a further preferred solution, a limiting portion is provided at one end of the secondary wind shield.

[0031] As a further preferred solution, the limiting portion abuts against a side wall of the burner housing.

[0032] As a further preferred solution, the spoiler assembly includes two spoiler plates spaced apart in the gas inflow direction.

[0033] As a further preferred solution, the number of the spoiler holes on one of the spoilers closer to the exhaust passage is greater than the number of the spoiler holes on the other spoiler.

[0034] As a further preferred solution, the two spoilers are connected together via a connecting portion.

[0035] As a further preferred solution, the spoiler has a drainage groove with an opening facing the air intake direction and a depression formed toward the exhaust passage.

[0036] As a further preferred solution, the drainage groove is formed by bending the spoiler.

[0037] As a further preferred solution, in the direction from the air inlet to the exhaust passage, the diameter of the guide groove gradually decreases.

[0038] As a further preferred solution, the spoiler is placed in the air inlet so as to fit the exhaust passage, and the first end is placed below a portion of the top wall plate close to the exhaust passage at an interval.

[0039] As a further preferred solution, the second end of the spoiler is connected to the side wall of the air inlet.

[0040] As a further preferred solution, the first end is bent to form a first flange portion and / or the second end is bent to form a second flange portion.

[0041] As a further preferred solution, the flange directions of the first flange portion and / or the second flange portion are both in the direction of gas outflow.

[0042] As a further preferred solution, the outer surface of the bent portion of the first flanging portion and / or the outer surface of the bent portion of the second flanging portion are both arc-shaped.

[0043] As a further preferred solution, the primary air port and the nozzle for injecting fuel gas are arranged in the burner in an aligned manner with each other.

[0044] As a further preferred solution, the flow channel system further includes:

[0045] The primary windshield has a windshield portion located on one side of the gap between the primary air port and the nozzle and at least partially shielding the gap from the side.

[0046] As a further preferred solution, one end of the wind shield is connected to the burner, and a passage for air circulation exists between the other end and the gas supply assembly.

[0047] As a further preferred solution, there is a portion at the end of the wind shield portion which is spaced apart and aligned with the nozzle in the covering direction.

[0048] As a further preferred embodiment, the portion where the wind shield portion is connected to the burner is close to the primary air port.

[0049] As a further preferred solution, the primary air shield is connected to the burner shell of the burner.

[0050] A combustion heat exchange component comprises the flow channel system described in any of the above schemes.

[0051] A gas water heater comprises the flow channel system described in any of the above schemes, or comprises the above combustion heat exchange component.

[0052] The main beneficial effects of the above technical solution are:

[0053] By setting a secondary windshield plate to block the air from flowing through the secondary air port, and providing an air inlet hole for air to flow into the secondary windshield plate, all the air is driven to flow into the burner from the part where the secondary air port and the top wall plate are connected in position and then dispersed, the air flow rate of the part where the secondary air port and the top wall plate are connected in position is increased to a certain extent, and the air flow rate of the part where the secondary air port and the exhaust channel are connected is reduced, so that the air flow distribution in the burner is more uniform, so as to improve the uniformity of gas combustion in the burner. Then, the combustion effect of the burner in the combustion heat exchange component is optimized. At the same time, by setting the spoiler in the flow channel from the air inlet to the exhaust channel in a manner that is adapted to the exhaust channel, and by providing a gap between the first end of the spoiler and the top wall plate, the uniformity of the overall air intake of the fan assembly can be balanced. In particular, when the above-mentioned fan assembly is placed in the combustion heat exchange assembly and used for the gas formed after the burner in the combustion heat exchange assembly burns, the uniformity of the gas flowing in the combustion heat exchange assembly can be improved, and the overall heat exchange effect can be optimized.

[0054] Further or more detailed beneficial effects will be described in detail in conjunction with specific examples in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The present invention will be further described below in conjunction with the accompanying drawings:

[0056] Figure 1 Schematic diagram of the flow channel system structure.

[0057] Figure 2 A schematic diagram of an existing combustion heat exchange component.

[0058] Figure 3 The figure is a schematic diagram of the air intake of the primary air port and the secondary air port in the existing burner.

[0059] Figure 4 This is a schematic diagram of the installation of the primary wind shield and the secondary wind shield.

[0060] Figure 5 Schematic diagram of the air intake of the secondary air port after installing the secondary wind deflector.

[0061] Figure 6 Installation diagram of secondary windshield Figure 1 .

[0062] Figure 7 Installation diagram of secondary windshield Figure 2 .

[0063] Figure 8 for Figure 4 A magnified schematic diagram of a structure in part X.

[0064] Fig. 9 for Figure 4 An enlarged schematic diagram of another structure of the X part.

[0065] Fig.10 Schematic diagram of spoiler installation.

[0066] Fig.11 Illustration of a fan assembly with a spoiler installed Figure 1 .

[0067] Fig.12 Illustration of a fan assembly with a spoiler installed Figure 2 .

[0068] Fig.13 Schematic diagram of the spoiler structure.

[0069] Fig.14 Schematic diagram of the multi-layer spoiler installation.

[0070] Fig.15 Schematic diagram of the spoiler component structure.

[0071] Fig.16 Installation diagram of spoiler with drainage groove Figure 1 .

[0072] Fig.17 Installation diagram of spoiler with drainage groove Figure 2 .

[0073] Fig.18 Schematic diagram of a spoiler with drainage grooves.

[0074] Fig.19 Schematic diagram of a gas water heater.

[0075] As shown in the figure: bottom shell a, burner b, burner shell b1, primary air port b11, secondary air port b12, wind shield mounting part b121, exhaust port b13, primary wind shield b2, wind shield part b21, drainage hole b211, mounting part b22, fire bar b3, feed channel b31, secondary wind shield b4, air inlet b41, mounting hole b42, limit part b43, connector b5, fan assembly c, smoke hood shell c1, exhaust channel c11, top wall plate c12, air inlet c13, fan c2, exhaust pipe c21, spoiler c3, spoiler hole c31, first end c32, first flange portion c321, second end c33, second flange portion c331, third end c34, third end connecting portion c341, fourth end c35, fourth end connecting portion c351, guide groove c36, connecting portion c4, heat exchange component d, heat exchange flow channel d1, gas supply component e, nozzle e1;

[0076] Flame 1. Primary air intake flow arrow one 2. Secondary air intake flow arrow 3. Primary air intake flow arrow two 4. Primary air intake flow arrow three 5. DETAILED DESCRIPTION

[0077] The present invention is specifically described below with reference to the embodiments:

[0078] Embodiment 1:

[0079] A flow channel system guides gas flow in a combustion and heat exchange component having a burner b and a fan component c.

[0080] Combustion heat exchange components, refer to the attached Figure 2 As shown, it is an important component of the gas water heater, which mainly includes a combustion heat exchange system and a gas supply component e installed on the bottom shell a of the gas water heater.

[0081] For combustion heat exchange system, such as the attached Figure 2 As shown, it mainly includes a burner b, a fan assembly c and a heat exchange assembly d.

[0082] Specifically, as attached Figure 2 and attached Figure 3As shown, the fan assembly c is placed above the burner b, and the fan assembly c and the burner b are connected through the heat exchange assembly d, so that the fan assembly c can form a negative pressure and draw up the high-temperature gas formed after the combustion of the gas in the burner b through the channel inside the heat exchange assembly d.

[0083] As attached Figure 3 As shown, the burner b in this embodiment includes a burner shell b1, a primary air port b11 for fuel input is arranged on the right side of the burner shell b1, a discharge port b13 for high-temperature gas after combustion and connected to the heat exchange component d is arranged at the upper end, and a secondary air port b12 for air entry is arranged at the lower end; and a plurality of spaced-apart fire bars b3 are installed inside the burner shell b1, each fire bar b3 has a feed channel b31, one end of the feed channel b31 is connected to the primary air port b11, and the other end is connected to the discharge port b13 in a corresponding position; the secondary air port b12 is connected to the discharge port b13 up and down through the gap space between the fire bars b3, so that air can enter from the secondary air port b12 and be discharged to the discharge port b13.

[0084] For gas supply components e, as attached Figure 2 and attached Figure 3 As shown, it mainly includes a pipeline for conveying gas and a nozzle e1 connected to the end of the pipeline for spraying gas.

[0085] Of course, in some gas water heaters, the gas supply component e may also include a gas proportional valve connected in the pipeline for adjusting the gas size, and a gas distributor for distributing the gas.

[0086] Specifically, as attached Figure 3 As shown, the nozzle e1 and the primary air port b11 are arranged in an aligned manner, so that the nozzle e1 can carry air into the burner b while injecting gas into the primary air port b11, thereby achieving premixing of gas with air before combustion to improve the combustion effect.

[0087] As attached Figure 2 As shown, the fan assembly c in this embodiment includes a hood housing c1 and a fan c2.

[0088] Due to the space limitation of the combustion and heat exchange components, the smoke hood shell c1 needs to be recessed to free up installation space for the fan c2, resulting in the smoke hood shell c1 including an exhaust passage c11 for exhaust and a top wall plate c12 located on one side of the exhaust passage c11 and intersecting the exhaust direction.

[0089] It should be noted that, as attached Figure 2As shown, the top wall plate c12 in this embodiment can be a part of the smoke hood shell c1; or, when other configuration structures are required, the top wall plate c12 can be a part of any other component, but its position and the effect of hindering the airflow are similar to those of the attached Figure 2 As shown, the problem of uneven airflow is formed. For example, when the fan c2 needs to be completely assembled in the smoke hood shell c1, part of the shell structure of the fan c2 forms, for example, an attached Figure 2 Top wall panel c12 shown.

[0090] For example, Figure 2 As shown in the figure, the air inlet c13 of the fan assembly c is connected to the exhaust port b13 of the burner b through the heat exchange flow channel d1; when the exhaust gas is discharged upward inside the combustion heat exchange assembly, the top wall plate c12 is extended horizontally and is located on the right side of the exhaust channel c11, and the fan c2 for providing suction to the exhaust channel c11 is placed above the top wall plate c12. Of course, other required components can be installed in the attached according to actual needs. Figure 2 The position of fan c2 shown in FIG, and fan c2 is placed elsewhere.

[0091] The fan c2 in this embodiment preferably includes: a rotary motor and an impeller connected to the rotary motor. The impeller is placed in a housing having one end connected to the exhaust passage c11 and the other end connected to the exhaust pipe c21. The rotary motor drives the impeller to rotate in the housing of constant volume to introduce the airflow from the exhaust passage c11 into the exhaust pipe c21 for discharge.

[0092] In the above combustion heat exchange assembly, the primary air port b11 and the secondary air port b12 are the main components of the flow channel system as air inlets; wherein:

[0093] The primary air port b11 is connected to the exhaust channel c11 in the hood shell c1 for exhaust through a first circulation channel that flows through the combustion zone (for example, the zone where the exhaust port b13 of the burner shell b1 is located for igniting and burning the gas) and the heat exchange zone (for example, the zone where the heat exchange channel d1 in the heat exchange component d is located for exchanging heat with the external medium). In this embodiment, the first circulation channel includes the feed channel b31, the exhaust port b13, and the heat exchange channel d1 of the fire row b3 in sequence; so that the suction effect of the fan c2 can be transmitted to the primary air port b11 through the exhaust channel c11, the air inlet c13, the heat exchange channel d1, the exhaust port b13, and the feed channel b31 in sequence, so as to introduce the injected gas and the air sucked by the gas into the primary air port b11.

[0094] The secondary air port b12 is connected to the exhaust channel c11 and the top wall plate c12 at the same time through a second circulation channel that flows through the combustion area (for example, the area where the exhaust port b13 of the burner shell b1 is located for igniting and burning the gas) and the heat exchange area (for example, the area where the heat exchange channel d1 in the heat exchange component d is located for exchanging heat with the external medium). In this embodiment, the second circulation channel includes the gap between the fire bars b3, the exhaust port b13, and the heat exchange channel d1 in sequence.

[0095] As attached Figure 2 As shown, the secondary air port b12 is connected to the exhaust channel c11 and the top wall plate c12 at the top through the second flow channel and the air inlet c13; the connection with the top wall plate c12 refers to a side surface of the top wall plate c12, such as the attached Figure 2 There is a passage for direct gas flow between the lower end surface of the middle top wall plate c12 and the secondary air port b12.

[0096] During operation, the gas entrains a portion of the air from the primary air port b11 into the feed channel b31 of the fire grate b3, flows through the feed channel b31 and is discharged to the cavity where the exhaust port b13 is located for ignition and combustion; the other portion of the air is discharged from the secondary air port b12 through the gap between the fire grate b3 to the cavity where the exhaust port b13 is located for fuel gas combustion. After combustion, high-temperature gas is formed. Under the negative pressure formed by the fan component c, the high-temperature gas is drawn from the exhaust port b13 to the heat exchange component d, passes through the heat exchange flow channel d1 of the heat exchange component d, and flows to the fan component c and is discharged from the exhaust pipe c21. Among them, as shown in the attached Figure 2 As shown, the heat exchange flow channel d1 is a gas flow channel that is connected vertically and is arranged in the heat exchange component d for the high-temperature gas formed after the combustion of the burner b to flow through the heat exchange component d and flow to the fan component c for discharge, and the side wall of the heat exchange flow channel d1 or the heat exchange flow channel d1 is provided with a pipeline for cold water circulation, so that the high-temperature air flowing through the heat exchange flow channel d1 can exchange heat with the cold water to drive the cold water to heat up.

[0097] Actual tests and use have found that using the above-mentioned flow channel system to guide the flow of gas and combustion air leads to poor combustion heat exchange effect. This problem mainly exists in two aspects:

[0098] First, the portion where the secondary air port b12 is connected to the exhaust channel c11 can smoothly introduce sufficient air from the outside for combustion, while the portion where the secondary air port b12 is connected to the top wall plate c12 has its introduced airflow blocked by the top wall plate c12, which can easily lead to the inability to smoothly introduce sufficient air from the outside for combustion, thereby causing the air for combustion to be unevenly distributed in the burner b, resulting in the problem of uneven gas combustion in the burner b.

[0099] Second, under the suction of the fan c2, the guided gas enters from the air inlet c13, part of it flows to the part of the air inlet c13 opposite to the exhaust channel c11, directly flows into the exhaust channel c11, and finally flows out from the exhaust pipe c21 of the fan c2; part of it flows to the part of the air inlet c13 opposite to the top wall plate c12, and after being blocked and diverted by the top wall plate c12, it may flow into the exhaust channel c11, and finally flows out from the exhaust pipe c21 of the fan c2. As a result, the gas can flow in and out smoothly in the part opposite to the air inlet c13 and the exhaust channel c11; the airflow introduced in the part opposite to the air inlet c13 and the top wall plate c12 is blocked by the top wall plate c12, and the speed of gas inflow will be greatly slowed down; thus, the fan component c itself has the problem of uneven drainage, and the flow channel system has the problem of uneven gas.

[0100] The above two problems have a combined impact on the combustion heat exchange effect.

[0101] Based on this, in this embodiment, as shown in the attached Figure 1 As shown, a secondary wind deflector b4 and a spoiler assembly are additionally provided.

[0102] For secondary wind deflector b4:

[0103] As attached Figure 4 , Attachment Figure 6 and attached Figure 7 As shown, the secondary wind shield b4 is covered on the secondary air port b12 to block the air flow, and the secondary wind shield b4 is provided with an air inlet b41 for air to flow in, and the air inlet b41 is aligned and communicated with the top wall plate c12.

[0104] In this way, the external air can be driven Figure 5 As shown by the arrow in the middle, the air flows into the burner B. Specifically, the air is driven to flow into the burner B from the portion of the secondary air port b12 that is connected to the top wall plate c12, and then the fan c2 draws part of the air sucked from the air inlet b41 through the exhaust channel c11 to guide the air flow in the portion of the secondary air port b12 that is connected to the exhaust channel c11, which can increase the air flow in the portion of the secondary air port b12 that is connected to the top wall plate c12 to a certain extent, and reduce the air flow in the portion of the secondary air port b12 that is connected to the exhaust channel c11, so that the air flow distribution in the burner B is more uniform, so as to improve the uniformity of the gas combustion in the burner b.

[0105] The secondary air shield b4 can be placed inside the burner housing b1 to cover the secondary air port b12 from the air outlet side of the secondary air port b12, but there is a problem of difficulty in installation.

[0106] In order to facilitate the cover installation operation and better block the air from entering the secondary air port b12, the secondary air shield b4 in this embodiment is installed on the air inlet side of the secondary air port b12. Figure 4 , Attachment Figure 6 and attached Figure 7 As shown, the secondary air shield b4 is installed on the secondary air port b12 from the lower end cover.

[0107] Of course, as long as the cover function is realized, the secondary air shield b4 can be installed on the burner shell b1, or on an external supporting structure, such as the bottom shell a mentioned above.

[0108] In this embodiment, as shown in the attached Figure 4 , Attachment Figure 7 As shown, the secondary air shield b4 is installed on the burner shell b1 of the burner b, which is not only convenient for installation, but also can better fit the burner shell b1 to better cover the secondary air port b12.

[0109] The secondary air shield b4 is preferably detachably mounted on the burner housing b1 by means of structures such as screws, pins, and snaps, so as to facilitate maintenance and replacement of the secondary air shield b4.

[0110] Considering the convenience of disassembly and the stability of installation; Figure 6 , Attachment Figure 7 As shown, in this embodiment, the secondary air shield b4 is fixed to the burner housing b1 by a plurality of connecting members b5, preferably connecting screws, and the secondary air shield b4 has a plurality of mounting holes b42 for the connecting members b5 to pass through.

[0111] Fittingly, both side walls of the secondary air port b12 are provided with windshield mounting parts b121 for mounting the secondary windshield b4, the windshield mounting parts b121 are provided with holes for screwing the connector b5, and the windshield mounting parts b121 have a part that fits the secondary windshield b4, so that the secondary windshield b4 can be more firmly connected to the burner b.

[0112] Furthermore, considering that the mounting holes b42 on the secondary wind shield b4 are easily deviated from the holes on the burner housing b1 for screwing the connecting piece b5, thus causing the problem of being unable to be installed, some mounting holes b42 are set as waist-shaped holes, which can reduce the accuracy requirements when punching the mounting holes b42 on the secondary wind shield b4 during production, and also facilitate the installation of the secondary wind shield b4.

[0113] As attached Figure 4 and attached Figure 6 As shown, a limiting portion b43 is provided at one end of the secondary air shield b4, and the limiting portion b43 abuts against the side wall of the burner housing b1, so as to achieve pre-positioning of the secondary air shield b4 during installation.

[0114] As a further development, considering that if external impurities enter the burner b during combustion, it will not only hinder the combustion but also easily form some toxic gases. Therefore, it is preferred to filter the air entering the burner b, especially the secondary air port b12 as the main air inlet.

[0115] In this embodiment, a filter member for covering the air inlet hole b41 can also be provided on the secondary wind shield b4. The filter member is installed on the outer side of the secondary wind shield b4 by screws, and the filter member is provided with mesh holes for screening and filtering the airflow entering the air inlet hole b41, thereby preventing impurities in the air from entering the burner b.

[0116] For the spoiler component:

[0117] As attached Fig.10 or attached Fig.14 As shown, a spoiler c3 may be included, or in the gas inflow direction, for example, Figure 1 Two spoilers c3 are arranged at intervals in the middle, or in the gas inflow direction, such as the attached Figure 1 A plurality of spoilers c3 are arranged at intervals in the middle and the upper and lower parts.

[0118] Compared with one spoiler c3, multiple spoilers c3 can enhance the flow limiting and deceleration effect; of course, two spoilers c3 do not refer to two plates that are exactly the same in size and structure, but mean that both plates have spoiler holes c31 and can achieve flow limiting and deceleration. The specific sizes and structures of the two spoilers c3 may be inconsistent.

[0119] The following takes a spoiler c3 as an example to illustrate the preferred installation position, specific structure and function of the panel. The other spoilers c3 can be set similarly, specifically:

[0120] As attached Fig.10 , Attachment Fig.11 As shown, the spoiler c3 is adapted to the exhaust channel c11 and is arranged in the flow channel from the air inlet c13 to the exhaust channel c11, and there is a gap between the first end c32 of the spoiler c3 and the top wall plate c12, and the gap allows the airflow flowing from the air inlet c13 to the top wall plate c12 to bypass the spoiler c3 and flow into the exhaust channel c11. The spoiler c3 is provided with a plurality of spoiler holes c31 for the air to flow from the air inlet c13 to the exhaust channel c11.

[0121] In this way, under the obstruction of the spoiler c3, the intake airflow flowing to the portion where the air inlet c13 and the exhaust channel c11 are opposite needs to pass through the spoiler c3 to enter the exhaust channel c11, thereby reducing the flow rate of the intake airflow at the portion where the air inlet c13 and the exhaust channel c11 are opposite; and the intake airflow flowing to the portion where the air inlet c13 and the top wall plate c12 are opposite can directly flow into the exhaust channel c11 through the gap between the first end c32 and the top wall plate c12 after being obstructed by the top wall plate c12, without causing excessive deceleration due to the spoiler c3, thereby being able to balance the uniformity of the overall air intake of the fan assembly.

[0122] At this time, the fan component c is applied to other systems or components. For example, the fan component c is used in the combustion heat exchange component of the gas water heater below. It can evenly guide the high-temperature gas formed after the combustion of the burner b in the combustion heat exchange component, so that the high-temperature gas formed after the combustion of the burner b can flow more evenly through the heat exchange component d, thereby optimizing the overall heat exchange effect.

[0123] The spoiler c3 may be installed in the exhaust passage c11 , or may be installed in the air inlet c13 to match the exhaust passage c11 .

[0124] As attached Fig.10 As shown, under the suction of the fan c2, the airflow flows upward into the exhaust channel c11, and the spoiler c3 is placed in the air inlet c13 and aligned with the airflow inlet at the lower end of the exhaust channel c11, so as to better cover the airflow inlet at the lower end of the exhaust channel c11, and better decelerate the airflow that directly passes through the air inlet c13 and the corresponding part of the exhaust channel c11 and flows into the exhaust channel c11. And the first end c32 is spaced below the part of the top wall plate c12 close to the exhaust channel c11.

[0125] At the same time, in order to increase the deceleration area, it is preferred that the second end c33 of the spoiler c3 is connected to the side wall of the air inlet c13.

[0126] Furthermore, as attached Fig.13 As shown, the first end c32 is bent to form a first flange portion c321 and / or the second end c33 is bent to form a second flange portion c331, so as to enhance the strength of the spoiler c3 and reduce the possibility of the spoiler c3 itself shaking due to the impact of airflow.

[0127] As attached Fig.13 As shown, the flange directions of the first flange portion c321 and / or the second flange portion c331 are both in the direction of gas outflow, thereby reducing the possibility of airflow impacting the gap in the flange and causing vortex generation.

[0128] As attached Fig.13As shown, the outer surface of the bent portion of the first flange portion c321 and / or the outer surface of the bent portion of the second flange portion c331 are both arc-shaped, which can guide the airflow flowing through the outer surface of the flange portion more smoothly and avoid the airflow impacting the outer surface of the angular structure of the flange portion to cause vortexes.

[0129] Of course, the spoiler c3 can be fixed to the smoke hood shell c1 in an irremovable manner by welding, or can be fixed to the smoke hood shell c1 in a detachable manner by screws.

[0130] In this embodiment, as shown in the attached Fig.12 and attached Fig.13 As shown, the spoiler c3 also includes a third end c34 and a fourth end c35 that are spaced apart and aligned; the third end c34 is provided with a third end connecting portion c341 for connecting to one side wall of the hood shell c1, and the fourth end c35 is provided with a fourth end connecting portion c351 for connecting to the other side wall of the hood shell c1, thereby achieving a balanced and stable installation of the spoiler c3, thereby enabling it to stably achieve the deceleration effect on the airflow.

[0131] Specifically, when fixing, the threaded end of the screw passes through the smoke hood shell c1 and is screwed to the third end connection part c341 or the fourth end connection part c351; or the threaded end of the screw passes through the third end connection part c341 or the fourth end connection part c351 and is screwed to the smoke hood shell c1.

[0132] Furthermore, the third end connection portion c341 and the fourth end connection portion c351 both have portions that fit against the side wall of the hood shell c1, thereby increasing the fitting connection area between the spoiler c3 and the hood shell c1 and further improving the connection stability.

[0133] On the basis of the above, for the following Fig.14 As shown, the spoiler assembly includes a spoiler assembly in the gas inflow direction, such as an Figure 1 When two spoilers c3 are set up with a gap between the upper and lower parts:

[0134] The two spoilers c3 may be provided separately, or may be connected together via a connecting portion c4, so as to improve the position stability between the two spoilers c3 and the stability of the overall structure.

[0135] Meanwhile, the number of spoiler holes c31 on one spoiler plate c3 closer to the exhaust passage c11 may be set to be greater than the number of spoiler holes c31 on another spoiler plate c3; Fig.14 In the embodiment, the number of the spoiler holes c31 in the upper spoiler plate c3 is greater than the number of the spoiler holes c31 in the lower spoiler plate c3.

[0136] When the flue gas flows through the lower plate, the lower plate has fewer openings, the flue gas flow is small, and the flow rate is fast; when the flue gas flows through the upper plate, there are more openings and the flue gas flow rate is slow; through the double-layer turbulence and uneven opening method, reasonable flow limitation and speed reduction of the flue gas can be achieved.

[0137] Furthermore, as attached Fig.16 , Attachment Fig.17 and attached Fig.18 As shown:

[0138] The spoiler c3 has a guide groove c36 with an opening facing the air intake direction and formed into a depression toward the exhaust passage c11, which can prevent the airflow slowed down by the spoiler c3 from scattering and guide the airflow slowed down by the spoiler c3 into the exhaust passage.

[0139] Furthermore, as attached Figure 1 As shown, the guide groove c36 is formed by bending the spoiler c3; and in order to achieve a better guide effect, in the direction from the air inlet c13 to the exhaust channel c11, for example, Fig.16 From bottom to top, the diameter of the drainage groove c36 gradually decreases.

[0140] When the secondary wind shield b4 is set, the air can be distributed more evenly in the flow system, which can make the combustion more uniform, and thus produce more uniform high-temperature flue gas. At the same time, under the setting of the spoiler component, the uniform attraction of the fan component c is not easy to have a disruptive effect on the above-mentioned uniformly flowing high-temperature flue gas, so that the high-temperature flue gas can flow evenly in the flow channel system to achieve a balanced combustion heat exchange effect.

[0141] In addition to the two issues mentioned above, Figure 2 and attached Figure 3 As shown, based on the spaced alignment of the nozzle e1 and the primary air port b11, the nozzle e1 can carry air into the burner b while spraying gas into the primary air port b11 to achieve premixing of gas and air before combustion to improve the combustion effect. There is a problem of affecting the combustion effect and thus affecting the combustion heat exchange effect, namely:

[0142] The negative pressure formed by the fan assembly c will suck the fuel through the feed channel b31 and the primary air port b11 to optimize the gas feed; at the same time, it will also suck the air through the primary air port b11 to form an intake airflow, which is easy to flow between the primary air port b11 and the nozzle e1 in a direction perpendicular to the gas injection direction. Figure 2 For the upper draft combustion heat exchange system shown in FIG. 1 , the nozzle e1 sprays the gas to the left toward the primary air port b11. Under the upward suction effect of the fan assembly c, the main result is the formation of the attached Figure 3The upward airflow shown by the primary air intake flow arrow 2 can easily form a shear force on the gas injected from the nozzle e1, causing an impact on the gas injection, resulting in unstable gas feed and thus unstable gas combustion.

[0143] Therefore, as a preferred embodiment, in this embodiment, as shown in the attached Figure 4 , Attachment Figure 6 and attached Figure 7 As shown, an additional primary wind shield b2 is provided.

[0144] For primary wind deflector b2:

[0145] As attached Figure 4 As shown, the primary wind shield plate b2 has a wind shielding portion b21 located on one side of the interval between the primary air port b11 and the nozzle e1, and at least partially shielding the interval from this side. Figure 2 For the top draft combustion heat exchange system shown, the primary wind shield b2 has a wind shield portion b21 located below the gap between the primary air port b11 and the nozzle e1 and at least partially shielding the gap from below.

[0146] In this way, the air can be prevented from flowing between the primary air port b11 and the nozzle e1 in a direction perpendicular to the gas injection direction, thereby effectively weakening the shear force generated by the air on the gas injected from the nozzle e1, alleviating the impact on the gas injection, and allowing the gas to be more stably input into the burner b from the primary air port b11, thereby improving the stability of the gas combustion in the burner b.

[0147] As for the primary air baffle b2, it can be installed on the burner housing b1, can be installed on the gas supply assembly e, and can also be installed on the bottom shell a.

[0148] In this embodiment, the primary air shield b2 is preferably installed on the burner housing b1, so as to better achieve the connection between the primary air shield b2 and the burner housing b1.

[0149] This is because the closer to the primary air port b11, the stronger the suction effect of the fan assembly c is, and the easier it is to form an airflow that has a shearing effect on the gas injection.

[0150] As attached Figure 4 and attached Figure 8 As shown, the left end of the wind shield b21 is preferably connected to the burner b to better block the strong airflow near the burner housing b1; and a channel for airflow is left between the right end of the wind shield b21 and the gas supply assembly e, so that the airflow can flow as shown in the attached Figure 4 The primary air intake flows in the direction of the arrow 24 into the primary air port b11 to achieve premixing with the fuel gas without easily causing shearing effect on the fuel gas sprayed by the nozzle e1.

[0151] At this time, it is preferable that the end of the wind shielding portion b21 has a portion spaced apart from and aligned with the nozzle e1 in the covering direction.

[0152] For example, Figure 8 As shown, the right end of the wind shield b21 preferably has a portion that is aligned with the upper and lower intervals of the nozzle e1, that is, the wind shield b21 can completely block the interval between the primary air port b11 and the nozzle e1 from below to form a larger obstruction area, thereby preventing the airflow from flowing vertically upward to between the primary air port b11 and the nozzle e1.

[0153] At the same time, it is preferred that the portion where the wind shield b21 and the burner b meet is close to the primary air port b11.

[0154] For example, Figure 4 As shown, the part where the left end of the wind shield b21 connects with the burner b is close to the lower end of the primary air port b11, so that when the airflow bypasses the wind shield b21, it is not easy to flow vertically upward to between the primary air port b11 and the nozzle e1, but it is easy to flow horizontally into the primary air port b11 under the suction action of the fan assembly c.

[0155] As attached Figure 6 and attached Figure 7 As shown, a mounting portion b22 is provided at one end of the wind shield b21 close to the burner housing b1, and the mounting portion b22 is adapted to the outer side surface of the burner housing b1, and the wind shield b21 is fixedly connected to the burner housing b1 through the mounting portion b22, so that the wind shield b21 can maintain a stable state to achieve airflow blocking.

[0156] Furthermore, it is preferred that the windshield portion b21 and the mounting portion b22 are formed in one piece, for example, Figure 6 and attached Figure 7 As shown, the mounting portion b22 is formed by bending the left end of the wind shielding portion b21 and is closely connected to the left side surface of the burner housing b1.

[0157] At the same time, the mounting portion b22 is detachably connected to the burner housing b1 by means of screws, pins, etc., so as to facilitate the removal and replacement of the primary wind shield b2.

[0158] As a further development, when it is necessary to increase the air intake volume of the primary air port b11, the following Fig. 9 As shown, an additional guide hole b211 extending obliquely is provided in the wind shield b21 to guide the airflow below the wind shield b21 along the guide hole b211 to flow into the primary air port b11 laterally.

[0159] The above description is only a preferred embodiment of the present invention and does not limit the scope of the present invention. In addition, the terms "vertical", "horizontal", "front", "rear" and the like mentioned in the embodiments of the present invention indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, 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, and therefore cannot be understood as a limitation of the present invention. It should be further explained that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like in the description should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The present invention will be described in detail with reference to the drawings and in combination with the embodiments.

[0160] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A flow channel system for guiding gas flow in a combustion heat exchange component having a burner (b) and a fan component (c), characterized in that: The flow channel system comprises: A primary air port (b11) is provided in the burner (b) for the combustion gas to flow into; A secondary air port (b12) is provided in the burner (b) for the combustion air to flow into; An air inlet (c13) which is simultaneously connected to the exhaust passage (c11) and a top wall plate (c12) disposed on one side of the exhaust passage (c11); a fan (c2), which is in communication with the exhaust passage (c11) and guides and exhausts the exhaust passage (c11); The primary air port (b11) is connected to the air inlet (c13) via a first flow channel flowing through the combustion zone and the heat exchange zone; The secondary air port (b12) is connected to the exhaust channel (c11) and the top wall plate (c12) in parallel through the second flow channel that flows through the combustion zone and the heat exchange zone and the air inlet (c13); A secondary wind shield (b4) is covered on the secondary air port (b12) to block air circulation, and the secondary wind shield (b4) is provided with an air inlet (b41) for air to flow in, and the air inlet (b41) is aligned and communicated with the top wall plate (c12); A spoiler assembly, comprising a spoiler (c3) adapted to the exhaust channel (c11) and arranged in a flow channel from the air inlet (c13) to the exhaust channel (c11), and a gap exists between a first end (c32) of the spoiler (c3) and the top wall plate (c12), and the gap allows at least part of the airflow flowing from the air inlet (c13) to the top wall plate (c12) to flow into the exhaust channel (c11) without passing through the spoiler (c3); The primary air port (b11) and the nozzle (e1) for injecting fuel gas are arranged on the burner (b) in an aligned manner with each other. The flow channel system also includes: The primary wind shield plate (b2) has a wind shield portion (b21) located at one side of the gap between the primary air port (b11) and the nozzle (e1) and at least partially shielding the gap from the side.

2. The flow channel system according to claim 1, characterized in that: The spoiler plate (c3) is provided with a plurality of spoiler holes (c31) for allowing gas to flow from the air inlet (c13) to the exhaust channel (c11).

3. The flow channel system according to claim 1, characterized in that: The secondary air shield plate (b4) is covered on the air intake side of the secondary air port (b12).

4. The flow channel system according to claim 1, characterized in that: The secondary air baffle (b4) is mounted on the burner housing (b1) of the burner (b).

5. The flow channel system according to claim 4, characterized in that: The secondary air shield (b4) is fixedly connected to the burner housing (b1) via a plurality of connecting parts (b5).

6. The flow channel system according to claim 5, characterized in that: The secondary wind shield (b4) has a plurality of mounting holes (b42) for the connecting member (b5) to pass through.

7. The flow channel system according to claim 4, characterized in that: A limiting portion (b43) is provided at one end of the secondary wind shield (b4).

8. The flow channel system according to claim 7, characterized in that: The limiting portion (b43) abuts against a side wall of the burner housing (b1).

9. The flow channel system according to claim 2, characterized in that: The spoiler assembly includes two spoiler plates (c3) spaced apart in the gas inflow direction.

10. The flow channel system according to claim 9, characterized in that: The number of the spoiler holes (c31) on one of the spoiler plates (c3) closer to the exhaust passage (c11) is greater than the number of the spoiler holes (c31) on the other spoiler plate (c3).

11. The flow channel system according to claim 9, characterized in that: The two spoilers (c3) are connected together via a connecting portion (c4).

12. The flow channel system according to claim 1, characterized in that: The spoiler (c3) has a drainage groove (c36) which opens toward the air intake direction and forms a depression toward the exhaust passage (c11).

13. The flow channel system according to claim 12, characterized in that: The drainage groove (c36) is formed by bending the spoiler (c3).

14. The flow channel system according to claim 12, characterized in that: In the direction from the air inlet (c13) to the exhaust passage (c11), the diameter of the guide groove (c36) gradually decreases.

15. The flow channel system according to claim 1, characterized in that: The spoiler (c3) is arranged in the air inlet (c13) so as to fit the exhaust passage (c11), and the first end (c32) is arranged at a distance below a portion of the top wall plate (c12) close to the exhaust passage (c11).

16. The flow channel system according to claim 15, characterized in that: The second end (c33) of the spoiler (c3) is connected to the side wall of the air inlet (c13).

17. The flow channel system according to claim 16, characterized in that: The first end (c32) is bent to form a first flange portion (c321) and / or the second end (c33) is bent to form a second flange portion (c331).

18. The flow channel system according to claim 17, characterized in that: The flange directions of the first flange portion (c321) and / or the second flange portion (c331) are both in the direction of gas outflow.

19. The flow channel system according to claim 17, characterized in that: The outer surface of the bent portion of the first flange portion (c321) and / or the outer surface of the bent portion of the second flange portion (c331) are both arc-shaped.

20. The flow channel system according to claim 1, characterized in that: One end of the wind shield (b21) is connected to the burner (b), and a passage for air circulation exists between the other end and the gas supply assembly (e).

21. The flow channel system according to claim 20, characterized in that: The end of the wind shield (b21) has a portion which is spaced apart from and aligned with the nozzle (e1) in the covering direction.

22. The flow channel system according to claim 20, characterized in that: The portion where the wind shield (b21) is connected to the burner (b) is close to the primary air port (b11).

23. The flow channel system according to claim 1, characterized in that: The primary air shield (b2) is connected to the burner shell (b1) of the burner (b).

24. A combustion heat exchange component, characterized in that: The invention comprises a flow channel system as described in any one of claims 1 to 23.

25. A gas water heater, characterized in that: It comprises the flow channel system described in any one of claims 1 to 23, or comprises the combustion heat exchange component described in claim 24.

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