CN220083312U - Combustion heat exchange assembly and gas water heater - Google Patents

Abstract

The utility model relates to the technical field of household appliances, in particular to a combustion heat exchange assembly and a gas water heater, wherein the combustion heat exchange assembly comprises: a burner having a secondary air port into which combustion air flows; a hood housing having an exhaust passage for exhaust gas, and a top wall plate located on one side of the exhaust passage so as to intersect with an exhaust direction; the secondary air port is simultaneously communicated with the exhaust passage and the top wall plate in an alignment way; the wind shield is covered on the secondary air port in a blocking way, is provided with an air inlet hole for air to flow in, and is in counterpoint communication with the top wall plate; the filter screen piece is provided with a part which covers the air inlet hole, and the part is provided with a plurality of filter holes for screening and filtering the air flow entering the air inlet hole. The preferred combustion heat exchange assembly can improve the uniformity of the gas combustion of the burner in the combustion heat exchange assembly by optimizing the air inlet structure of the secondary air port.

Description

Combustion heat exchange assembly and gas water heater

Technical Field

The utility model relates to the technical field of household appliances, in particular to a combustion heat exchange assembly and a gas water heater.

Background

The gas water heater is the most convenient and economic device for quickly heating water at present, has high energy conversion efficiency, and saves more energy compared with an electric water heater.

The combustion heat exchange assembly shown in fig. 2 below is a main component of the gas water heater, and generally consists of a combustion heat exchange system and a gas supply assembly, wherein the combustion heat exchange system comprises a fan assembly, a heat exchange assembly and a burner assembly. For the updraft type combustion heat exchange system, the fan assembly is arranged above the burner assembly, and the burner assembly is connected with the fan assembly through the heat exchange assembly. When the burner assembly works, the burner assembly receives the fuel gas sprayed from the nozzle of the fuel gas supply assembly (comprising a transportation pipeline, a fuel gas distributor and the like) and burns, the high-temperature flue gas after burning flows out of the burner assembly under the attraction effect of the fan assembly, flows through the heat exchange assembly and realizes heat exchange with water to be heated, and then flows to the fan assembly and is discharged. The fan assembly not only guides the high-temperature flue gas after combustion, but also drives external air to enter the burner assembly from the fuel gas feeding port and the air ports at other positions to provide sufficient oxygen for combustion of fuel gas.

However, in practical use, it was found that the burner in the above system had a problem of unstable gas combustion.

Disclosure of Invention

The utility model aims at overcoming the defects of the prior art, and provides a combustion heat exchange assembly, which improves the stability of gas combustion of a combustor in the combustion heat exchange assembly by optimizing an air inlet structure of a secondary air port.

On the basis, the gas water heater with the combustion heat exchange assembly is also provided.

The technical solution of the utility model is as follows:

a combustion heat exchange assembly comprising:

a burner having a secondary air port into which combustion air flows;

a hood case having an exhaust passage for exhaust and a top wall plate provided on one side of the exhaust passage so as to intersect an exhaust direction;

the secondary air port is simultaneously communicated with the exhaust passage and the top wall plate in an alignment way;

the wind shield is covered on the secondary air port in a blocking way, is provided with an air inlet hole for air to flow in, and is in counterpoint communication with the top wall plate;

the filter screen piece is provided with a part which covers the air inlet hole, and the part is provided with a plurality of filter holes for screening and filtering the air flow entering the air inlet hole.

The problem of unstable combustion of gas in the burner is found by research to comprise two reasons:

on the one hand is: due to the space limitation of the combustion heat exchange component, a concave arrangement is needed on the smoke hood shell to vacate the installation space of the fan, and a top wall plate which is intersected with the exhaust direction and positioned at one side of the exhaust channel is formed; at this time, the secondary air port is simultaneously aligned with the exhaust passage and the top wall plate. The part that leads to secondary air mouth and exhaust passage to lead to can be smooth and easy from outside introduce sufficient air for burning, and the part that secondary air mouth and roof board counterpoint are led to the intercommunication, and the air current that its introduced is blocked by the roof board, leads to the outside that this part can't be smooth and easy to introduce sufficient air for burning, and then makes the air that supplies the burning uneven distribution and lead to the combustor to have the uneven problem of gas burning in the combustor, leads to burning unstably.

Based on the above, in the above scheme, a wind shield for blocking air from flowing from the secondary air port is arranged, the wind shield is provided with an air inlet hole for air to flow in, the air inlet hole is communicated with the top wall plate in an alignment way, and the air inlet hole and the exhaust channel are arranged in a dislocation way; thus, the air is driven to flow into the burner from the part of the secondary air port, which is in para-position communication with the top wall plate, and then the fan is used for guiding part of the air sucked from the air inlet hole to the part of the secondary air port, which is in para-position communication with the exhaust channel, through the suction of the exhaust channel, so that the air flow of the part of the secondary air port, which is in para-position communication with the top wall plate, can be increased to a certain extent, the air flow of the part of the secondary air port, which is in para-position communication with the exhaust channel, is reduced, the air flow distribution in the burner is more uniform, and the uniformity of gas combustion of the burner is improved.

The other aspect is: under the driving action of the air inflow, some large-particle impurities easily enter the combustor along with the air inflow from the secondary air port, so that the combustion is influenced in a blocking way, and the combustion is unstable.

Based on this, still be provided with filter screen spare in the above-mentioned scheme, filter screen spare exists and covers in the part of inlet port, and this part is equipped with a plurality of to entering the air current of inlet port and carry out screening filtration's filtration pore, can filter the air current that gets into from the inlet port and screen, filters out the impurity of some macroparticles, avoids these impurity to cause the hindrance influence to the burning, improves the stability of whole burning.

Further preferably, the wind guard is mounted to a burner housing of the burner.

Further preferably, the wind guard is detachably mounted to the burner housing.

Further preferably, the wind shield is fixedly connected to the burner housing through a plurality of connecting screws, and a plurality of mounting holes for the connecting screws to penetrate are formed in the wind shield.

Further preferably, part of the mounting holes are waist-shaped holes.

Further preferably, a limiting part is arranged at one end of the wind shield, and the limiting part is abutted against the side wall of the burner housing.

Further preferably, two side walls of the secondary air port are provided with wind guard mounting portions for mounting the wind guard, and the wind guard mounting portions are provided with portions which fit the wind guard.

Further preferably, the screen member and the wind deflector are integrally formed.

Further preferably, the filter screen member is detachably mounted to the wind deflector.

A gas water heater comprising a combustion heat exchange assembly as described in any one of the above schemes.

The technical scheme has the main beneficial effects that:

through setting up the deep bead that separation air flows from the secondary air mouth to be equipped with the inlet port that supplies the air inflow at the deep bead, order about that the whole part that is located the intercommunication from secondary air mouth and roof board flows into the combustor and then disperses, increase the air flow of the part that secondary air mouth is located the intercommunication with the roof board to a certain extent, reduce the air flow of the part that secondary air mouth and exhaust passage are located the intercommunication, make the air flow distribution more even in the combustor, in order to improve the homogeneity of gas combustion in the combustor.

Meanwhile, the filter screen piece is arranged through the adaptation air inlet hole, so that air flow entering the air inlet hole is filtered, impurities are prevented from entering the combustor, and the stability of gas combustion in the combustor is further improved.

Further or more detailed benefits will be described in connection with specific embodiments.

Drawings

The utility model is further described with reference to the accompanying drawings:

fig. 1 is a schematic view of the installation of a wind deflector and a screen member.

FIG. 2 is a schematic diagram of a prior art combustion heat exchange assembly.

FIG. 3 is a schematic view of secondary air port intake in a conventional burner.

FIG. 4 is a schematic view of secondary air port intake in a post-combustor with a windguard mounted.

Fig. 5 is a second schematic view of the installation of the wind deflector and the screen member.

FIG. 6 is a schematic diagram of a gas water heater.

The figure shows: a bottom case a, a burner b, a burner case b1, a primary air port b11, a secondary air port b12, a wind deflector mounting portion b121, a discharge port b13, a fire row b3, a feed passage b31, a wind deflector b4, an intake port b41, a mounting hole b42, a stopper b43, a connection screw b5, a screen member b6, a screen hole b601, a screen member retention hole b602, a fan assembly c, a hood case c1, a discharge passage c11, a top wall plate c12, a fan c2, a heat exchange assembly d, a heat exchange flow passage d1, a gas supply assembly e, a nozzle e1;

flame 1, secondary air inlet flow arrow 3.

Detailed Description

The utility model is illustrated by the following examples in which:

embodiment one:

the combustion heat exchange assembly, referring to fig. 2 and 6, is an important constituent part of the gas water heater, and mainly comprises a combustion heat exchange system and a gas supply assembly e, which are installed on a bottom shell a of the gas water heater.

For a combustion heat exchange system, as shown in fig. 2, it mainly includes a burner b, a fan assembly c and a heat exchange assembly d.

Specifically, as shown in fig. 2 and fig. 3, the fan assembly c is disposed above the burner b, and the fan assembly c is communicated with the burner b through the heat exchange assembly d, so that the fan assembly c can form negative pressure and pump up high-temperature gas formed after combustion of fuel gas in the burner b through a channel inside the heat exchange assembly d.

As shown in fig. 3, the burner b in the present embodiment includes a burner housing b1, a primary air port b11 for inputting fuel is provided on the right side of the burner housing b1, a discharge port b13 for discharging high temperature gas after combustion and communicating with the heat exchange assembly d is provided on the upper end, and a secondary air port b12 for entering air is provided on the lower end; a plurality of fire rows b3 are arranged in the burner shell b1 at intervals, each fire row b3 is provided with a feeding channel b31, one end of each feeding channel b31 is communicated with the primary air port b11, and the other end of each feeding channel b31 is communicated with the row through port b13 in an alignment manner; the secondary air port b12 communicates up and down with the discharge port b13 through the gap space between the fire rows b3, so that air can enter from the secondary air port b12 and be discharged into the discharge port b 13.

During operation, fuel gas enters a feeding channel b31 of the fire row b3 from the primary air port b11, flows through the feeding channel b31, is discharged into a cavity where the row through port b13 is located for ignition combustion to form high-temperature gas, and under the negative pressure effect formed by the fan assembly c, the high-temperature gas is pumped to the heat exchange assembly d from the row through port b13, flows to the fan assembly c after passing through a heat exchange flow channel d1 of the heat exchange assembly d, and is discharged. As shown in fig. 2, the heat exchange flow channel d1 is a gas flow channel which is arranged in the heat exchange component d and is communicated with the air blower component c from top to bottom and is used for discharging high-temperature gas formed by burning the burner b, and a side wall of the heat exchange flow channel d1 or a pipeline used for circulating cold water is arranged in the heat exchange flow channel d1, so that the high-temperature air flowing through the heat exchange flow channel d1 can exchange heat for the cold water to drive the cold water to rise in temperature.

As for the gas supply assembly e, as shown in fig. 2 and 3, it mainly includes a pipe for transporting gas and a nozzle e1 connected to an end of the pipe for injecting gas.

Of course, in some gas water heaters, the gas supply assembly e may further include a gas proportional valve connected in the pipe to adjust the size of the gas, and a gas distributor to distribute the gas.

Specifically, as shown in fig. 3, the nozzle e1 and the primary air port b11 are arranged in a staggered manner, so that the nozzle e1 sprays fuel gas into the primary air port b11 and simultaneously can take up air into the burner b, thereby realizing premixing of the fuel gas and the air before combustion and improving the combustion effect.

As shown in fig. 2, the fan assembly c in the present embodiment includes a hood housing c1, and a fan c2.

Because of the space limitation of the combustion heat exchange assembly, the concave arrangement is needed on the fume hood housing c1 to vacate the installation space for the fan c2, the fume hood housing c1 comprises an exhaust channel c11 for exhausting and a top wall plate c12 which is positioned on one side of the exhaust channel c11 and is intersected with the exhaust direction, for example, as shown in fig. 2, when the interior of the combustion heat exchange assembly is exhausted upwards, the top wall plate c12 is transversely extended and positioned on the right side of the exhaust channel c11, and the fan c2 is arranged above the top wall plate c 12. Of course, depending on the actual requirements, other required components may be installed at the position of the fan c2 shown in fig. 2, and the fan c2 may be placed elsewhere.

At this time, the exhaust port b13 is simultaneously aligned with the exhaust passage c11 and the top wall plate c12 located above through the heat exchange flow passage d 1; wherein in aligned communication with the top wall plate c12 means that a side of the top wall plate c12, such as the lower end of the top wall plate c12 in fig. 2, is in direct flow communication with the exhaust port b 13.

The primary air port b11 communicates with the exhaust passage c11 through the feed passage b31, the discharge passage b13, and the heat exchange flow passage d1 of the fire row b3, so that the suction action of the blower c2 can be transmitted to the primary air port b11 through the exhaust passage c11, the heat exchange flow passage d1, the discharge passage b13, and the feed passage b31 in this order, and the injected fuel gas and the air entrained by the fuel gas can be introduced into the primary air port b11.

The secondary air ports b12 are simultaneously aligned with the exhaust passage c11 and the top wall plate c12 located above through the gaps between the fire rows b3, the row through ports b13, and the heat exchanging channels d1, so that the outside air can flow into the burner b for combustion as indicated by the secondary air intake flow arrows 3 in fig. 3.

Actual test and use findings: the portion of the secondary air port b12 communicating with the exhaust passage c11 can smoothly introduce a sufficient amount of air from the outside for combustion, while the portion of the secondary air port b12 communicating with the top wall plate c12 in alignment, the introduced air flow of which is blocked by the top wall plate c12, easily results in that the portion cannot smoothly introduce a sufficient amount of air from the outside for combustion, and further causes the problem of uneven combustion of the gas in the burner b due to uneven distribution of the air for combustion in the burner b.

Based on this, as shown in fig. 1 and 4, a wind deflector b4 is added in the present utility model.

Specifically, as shown in fig. 1, the wind guard b4 is covered on the secondary air port b12 to block air flow, and the wind guard b4 is provided with an air inlet hole b41 for air to flow in, and the air inlet hole b41 is in alignment communication with the top wall plate c 12.

In this way, the outside air is forced to flow into the burner b as indicated by the arrow in fig. 4. Specifically, most of the air is driven to flow into the burner b from the portion of the secondary air port b12 in communication with the top wall plate c12, and then the fan c2 draws part of the air drawn from the air inlet b41 to the portion of the secondary air port b12 in communication with the air outlet c11 through the air outlet c11, so that the air flow rate of the portion of the secondary air port b12 in communication with the top wall plate c12 can be increased to a certain extent, the air flow rate of the portion of the secondary air port b12 in communication with the air outlet c11 can be reduced, the air flow rate distribution in the burner b can be more uniform, and the uniformity of gas combustion in the burner b can be improved.

The wind deflector b4 may be disposed inside the burner housing b1 to cover the secondary air port b12 from the air outlet side of the secondary air port b12, but has a problem of difficulty in installation.

In order to facilitate the capping operation and to better block air from entering the secondary air port b12, the wind deflector b4 in this embodiment is preferably capped on the air intake side of the secondary air port b12, for example, as shown in fig. 1 and 5, and the wind deflector b4 is capped on the secondary air port b12 from the lower end.

Of course, the wind deflector b4 may be mounted to the burner housing b1 or to an external support structure, such as the bottom case a described above, only by performing the cover mounting function.

In this embodiment, as shown in fig. 1, the wind deflector b4 is mounted on the burner housing b1 of the burner b, so that not only is the installation convenient, but also the wind deflector b4 can be better attached to the burner housing b1 to better cover the secondary air port b12.

The wind shield b4 is preferably detachably mounted on the burner housing b1 by means of a structure such as a screw, a pin, a buckle, etc., so that the wind shield b4 can be easily maintained and replaced.

Considering the convenience requirement of disassembly and the stability requirement of installation; as shown in fig. 1 and 5, in the present embodiment, the wind shield b4 is fixedly connected to the burner housing b1 by a plurality of connection screws b5, and a plurality of mounting holes b42 through which the connection screws b5 penetrate are provided in the wind shield b4.

Adaptively, two side walls of the secondary air port b12 are respectively provided with a wind shield installation part b121 for installing a wind shield b4, the wind shield installation part b121 is provided with a hole site for the connection screw b5 to be screwed, and the wind shield installation part b121 is provided with a part which is adaptively attached to the wind shield b4. The wind deflector b4 can be more firmly connected to the burner b.

Further, considering that the mounting hole b42 on the wind deflector b4 is easy to deviate from the hole site on the burner housing b1 for the connection screw b5 to be screwed, the problem that the wind deflector b4 cannot be mounted is solved, and part of the mounting hole b42 is formed into a waist-shaped hole, so that the precision requirement for punching the mounting hole b42 on the wind deflector b4 in production can be reduced, and the wind deflector b4 can be mounted conveniently.

As shown in fig. 1 and 5, one end of the wind deflector b4 is provided with a limiting portion b43, and the limiting portion b43 abuts against the side wall of the burner housing b1, so that the wind deflector b4 can be positioned in advance during installation.

Meanwhile, it is considered that impurities may enter the burner b from the air intake hole b41 with the air flow, thereby causing an unstable effect on combustion, particularly with respect to the air intake hole b41 as the main inlet of air.

As shown in fig. 1, a sieve member b6 is provided, which has a portion covering the air intake hole b41, and which is provided with a plurality of sieve holes b601 for sieving and filtering the air flow entering the air intake hole b 41. The air flow entering from the air inlet hole b41 is filtered and screened, some large-particle impurities are filtered, the blocking influence of the impurities on combustion is avoided, and the stability of integral combustion is improved.

At this time, the screen member b6 and the wind deflector b4 may be integrally formed, and the wind deflector b4, that is, the screen member b6 may be mounted without requiring a secondary mounting operation. When the screen member b6 and the wind deflector b4 may be formed in one body, the screen member b6 serves as a part of the wind deflector b4.

The filter screen member b6 and the wind deflector b4 may be connected separately, and in order to facilitate replacement and cleaning of the filter screen member b6 which is easy to be polluted and blocked, it is preferable that the filter screen member b6 is detachably mounted on the wind deflector b4.

In this embodiment, as shown in fig. 1, in order to adapt to the installation structure of the wind shield b4, at the same time, the additional addition of screws for fixing the filter screen b6 is avoided, a plurality of filter screen retaining holes b602 are provided on the filter screen b6, and each filter screen retaining hole b602 has a mounting hole b42 on the wind shield b4 aligned with it, so that the filter screen b6 and the wind shield b4 are fastened simultaneously by the connection screw b 5. That is, during the installation, the threaded end of the connection screw b5 passes through the screen member retention hole b602 of the screen member b6 and the installation hole b42 of the wind deflector b4 in order to be screwed and fixed to the wind deflector installation portion b121 of the burner housing b1, thereby completing the installation.

Embodiment two:

a gas water heater, as shown in figure 6, comprises a combustion heat exchange assembly in a first embodiment.

The foregoing description is only of the preferred embodiments of the utility model and is not intended to limit the scope of the utility model. In addition, references to the terms "vertical", "horizontal", "front", "rear", etc., in the embodiments of the present utility model indicate that the apparatus or element in question has been put into practice, based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product is conventionally put in use, merely for convenience of description and to simplify the description, but do not indicate or imply that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. It should be further noted that, unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," and the like in the description are to be construed broadly as, for example, "connected," either permanently connected, detachably connected, or integrally connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A combustion heat exchange assembly, comprising:

a burner (b) having a secondary air port (b 12) into which combustion air flows;

a hood case (c 1) having an exhaust passage (c 11) for exhausting air, and a top wall plate (c 12) provided on one side of the exhaust passage (c 11) so as to intersect the exhaust direction;

the secondary air port (b 12) is simultaneously communicated with the exhaust passage (c 11) and the top wall plate (c 12) in an alignment manner;

a wind deflector (b 4) which is covered on the secondary air port (b 12) in a manner of blocking air circulation, wherein the wind deflector (b 4) is provided with an air inlet hole (b 41) for air to flow in, and the air inlet hole (b 41) is communicated with the top wall plate (c 12) in an alignment way;

-a sieve element (b 6) having a portion covering said inlet aperture (b 41) and provided with a plurality of sieve apertures (b 601) for sieving and filtering the air flow entering said inlet aperture (b 41).

2. The combustion heat exchange assembly of claim 1, wherein: the wind deflector (b 4) is mounted to a burner housing (b 1) of the burner (b).

3. The combustion heat exchange assembly of claim 2, wherein: the wind deflector (b 4) is detachably mounted to the burner housing (b 1).

4. A combustion heat exchange assembly according to claim 3, wherein: the wind shield (b 4) is fixedly connected to the burner housing (b 1) through a plurality of connecting screws (b 5), and a plurality of mounting holes (b 42) for the connecting screws (b 5) to penetrate are formed in the wind shield (b 4).

5. The combustion heat exchange assembly of claim 4 wherein: part of the mounting holes (b 42) are waist-shaped holes.

6. The combustion heat exchange assembly of claim 2, wherein: one end of the wind shield (b 4) is provided with a limiting part (b 43), and the limiting part (b 43) is abutted against the side wall of the burner housing (b 1).

7. The combustion heat exchange assembly of claim 2, wherein: both side walls of the secondary air port (b 12) are respectively provided with a wind deflector installation part (b 121) for installing the wind deflector (b 4), and the wind deflector installation part (b 121) is provided with a part which is fit and attached to the wind deflector (b 4).

8. The combustion heat exchange assembly of any one of claims 1 to 7, wherein: the screen member (b 6) and the wind deflector (b 4) are integrally formed.

9. The combustion heat exchange assembly of any one of claims 1 to 7, wherein: the filter screen member (b 6) is detachably mounted to the wind deflector (b 4).

10. A gas water heater, characterized in that: a combustion heat exchange assembly according to any one of claims 1 to 9.