CN213713061U - Combustion device and gas water heating equipment - Google Patents

Abstract

The utility model relates to a burner and gas hot water equipment are in the use, import the mist from the connector to the mixing chamber through drawing the ejector pipe, because a part of the boss that flow equalizes is located the mixing chamber, and set up with the connector relatively, therefore, the mist that flows out from the connector can not flow into the mixing groove in the current equalizer directly under the choked flow effect of the boss that flow equalizes, but shunts to the mixing chamber all around, make gas and air fully mix in the mixing chamber, simultaneously, also guarantee the gas after mixing and distribute in the mixing chamber balancedly; after mixing, the air current flows into the mixing groove from the mixing chamber for gas and air mix and distribute again, and the gas mixture that guarantees the fire hole exhaust mixes with the distribution is balanced, thereby effectively promotes flame combustion's stability. Meanwhile, the mixing chambers are independent from each other, so that the air supply in each layer of mixing chamber and the mixing groove can be independently controlled in the using process, and the combustion device can realize sectional combustion.

Description

Combustion device and gas water heating equipment

Technical Field

The utility model relates to a hot water equipment technical field especially relates to burner and gas hot water equipment.

Background

The combustion apparatus is a generic term for an apparatus for ejecting and mixing fuel and air in a predetermined manner, and is classified into a diffusion type combustion apparatus, an atmospheric type combustion apparatus, and a completely premixed type combustion apparatus according to primary air. The general of market gas heater at present mainly comprises burner housing, a plurality of burner monolithic, burner curb plate and installation component equipment, and different load demands then make up with different burner monolithic quantity, and the structure is comparatively complicated, and the production process is more. The traditional combustor is limited by design elements such as structure, service environment and cost, and the problem of uneven mixing of gas and air easily occurs, so that the combustion stability of the combustor is influenced, and the combustion characteristics and the use experience of a user are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a combustion device which realizes multi-stage combustion and meets the requirements of different types of load combustion; meanwhile, the gas-fuel mixed gas is distributed evenly, and the stability of flame combustion is improved.

The second technical problem solved by the utility model is to provide a gas water heater, which realizes multi-stage combustion and meets the requirements of different load combustion; meanwhile, the gas-fuel mixed gas is distributed evenly, and the stability of flame combustion is improved.

The first technical problem is solved by the following technical scheme:

a combustion apparatus, comprising: the mixing device comprises a base, wherein a mixing cavity, a connecting port and a first air flow channel are arranged on the base, one mixing cavity in any two adjacent mixing cavities is arranged outside the other mixing cavity in a surrounding manner, the mixing cavity is communicated with at least one connecting port, and the first air flow channel is positioned between the two adjacent mixing cavities; the flow equalizer is stacked on the base, a mixing groove communicated with the mixing cavity and a second air flow channel communicated with the first air flow channel are arranged on the flow equalizer, one mixing groove in any two adjacent mixing grooves is annularly arranged outside the other mixing groove, the second air flow channel is positioned between the two adjacent mixing grooves, a flow equalizing boss is arranged on the flow equalizer or the base, and at least one part of the flow equalizing boss is positioned in the mixing cavity and is opposite to the connecting port; the fire cover is provided with a fire hole communicated with the mixed flow groove, and the fire cover covers the notch of the mixed flow groove; the injection pipe is communicated with the connecting port.

Burner, compare produced beneficial effect with the background art: in the use process, the mixed gas is input into the mixing cavity from the connecting port through the injection pipe, and part of the flow equalizing boss is positioned in the mixing cavity and is arranged opposite to the connecting port, so that the mixed gas flowing out of the connecting port cannot directly flow into a flow mixing groove in the flow equalizer under the flow choking effect of the flow equalizing boss, but is shunted to the peripheral mixing cavity, so that the gas and the air are fully mixed in the mixing cavity, and meanwhile, the mixed gas is ensured to be distributed in the mixing cavity in a balanced manner; after mixing, the air current flows into the mixing groove from the mixing chamber for gas and air mix and distribute again, and the gas mixture that guarantees the fire hole exhaust mixes with the distribution is balanced, thereby effectively promotes flame combustion's stability. Meanwhile, the mixing cavity, the mixed flow groove, the first air flow channel and the second air flow channel are independent from each other, so that air supply in each layer of mixing cavity and the mixed flow channel can be independently controlled in the using process, the combustion device realizes sectional combustion, and the requirements of different loads of users are greatly met.

In one embodiment, the flow equalizing boss is provided with a flow blocking surface, and a first flow equalizing surface and a second flow equalizing surface which are respectively located on two opposite sides of the flow blocking surface, the flow blocking surface is arranged opposite to the connecting port, and the first flow equalizing surface, the flow blocking surface and the second flow equalizing surface are sequentially distributed along the annular direction of the mixing groove.

In one embodiment, the distance between the first flow equalizing surface and the second flow equalizing surface gradually increases from the side of the flow equalizing boss close to the flow blocking surface to the side of the flow equalizing boss far away from the flow blocking surface.

In one embodiment, a first flow equalizing hole is formed in the flow blocking surface and communicated with the flow mixing groove.

In one embodiment, the flow equalizing boss is provided with a flow equalizing groove towards one side face in the flow equalizing groove, the first flow equalizing hole, the flow equalizing groove and the flow mixing groove are sequentially communicated, and for a section of the flow equalizing groove close to the flow mixing groove, the flow area A of the flow equalizing groove increases from the inside of the flow equalizing groove to the notch of the flow equalizing groove.

In one embodiment, a flow equalizing piece is arranged between the groove walls of the flow mixing groove, the flow equalizing piece extends along the annular direction of the flow mixing groove, and a second flow equalizing hole is formed in the flow equalizing piece.

In one embodiment, a first mounting groove and a second mounting groove are formed in the mixing groove, the first mounting groove extends along an inner groove wall of the mixing groove, the second mounting groove extends along an outer groove wall of the mixing groove, and an inner ring plate and an outer ring plate of the fire cover are correspondingly clamped into the first mounting groove and the second mounting groove respectively.

In one embodiment, in any two adjacent fire covers, one fire cover positioned at the inner ring is arranged in a protruding mode relative to one fire cover positioned at the outer ring.

In one embodiment, the side surface of the fire cover is provided with a fire transmission hole.

In one embodiment, a first mounting portion is disposed on an inner wall of the first air flow passage, a first mounting hole is disposed on the first mounting portion, a second mounting portion is disposed on an inner wall of the second air flow passage, and a second mounting hole opposite to the first mounting hole is disposed on the second mounting portion.

In one embodiment, the combustion apparatus further comprises a seal disposed between the base and the flow equalizer.

In one embodiment, the combustion apparatus further comprises an ignition assembly, the base is further provided with a third air flow channel, the third air flow channel is located in the enclosure of the innermost mixing cavity, the third air flow channel penetrates through the flow equalizer, and the ignition assembly is installed in the third air flow channel.

In one embodiment, the base is further provided with at least two adjusting holes, and the at least two adjusting holes are arranged at intervals on the periphery of the outermost mixing cavity.

The second technical problem is solved by the following technical solutions:

a gas fired water heating apparatus comprising a combustion device as claimed in any preceding claim.

Gas hot water equipment, compare produced beneficial effect with the background art: by adopting the combustion device, in the using process, the mixed gas is input into the mixing cavity from the connecting port through the injection pipe, and as a part of the flow equalizing boss is positioned in the mixing cavity and is arranged opposite to the connecting port, the mixed gas flowing out of the connecting port cannot directly flow into the mixing groove in the flow equalizer under the flow-blocking effect of the flow equalizing boss, but is shunted to the peripheral mixing cavities, so that the gas and the air are fully mixed in the mixing cavity, and meanwhile, the mixed gas is ensured to be distributed in the mixing cavity in a balanced manner; after mixing, the air current flows into the mixing groove from the mixing chamber for gas and air mix and distribute again, and the gas mixture that guarantees the fire hole exhaust mixes with the distribution is balanced, thereby effectively promotes flame combustion's stability. Meanwhile, the mixing cavity, the mixed flow groove, the first air flow channel and the second air flow channel are independent from each other, so that air supply in each layer of mixing cavity and the mixed flow channel can be independently controlled in the using process, the combustion device realizes sectional combustion, and the requirements of different loads of users are greatly met.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of a combustion apparatus according to an embodiment;

FIG. 2 is an exploded view of the combustion device according to one embodiment;

FIG. 3 is a schematic view of the flow of gas in the combustion apparatus according to an embodiment;

FIG. 4 is a schematic diagram illustrating a disassembled structure of a current equalizer and a base according to an embodiment;

FIG. 5 is a cross-sectional view of a base structure according to an embodiment;

FIG. 6 is a cross-sectional view of a second embodiment of a base structure;

FIG. 7 is a first diagram illustrating an embodiment of a current equalizer;

FIG. 8 is a diagram illustrating a second exemplary embodiment of a current equalizer;

FIG. 9 is a cross-sectional view of a flow equalizer configuration according to one embodiment;

fig. 10 is a schematic view of a fire lid structure according to an embodiment.

Reference numerals:

100. a combustion device; 110. a base; 111. a mixing chamber; 112. a first air flow passage; 113. a third air flow path; 114. a flow guide part; 1141. a connecting port; 1142. a flow guide cavity; 115. an adjustment hole; 116. a third mounting hole; 117. a first mounting portion; 1171. a first mounting hole; 120. a current equalizer; 121. a mixing trough; 1211. an inner tank wall; 1212. an outer tank wall; 122. a second air flow passage; 123. a flow equalizing boss; 1231. a first flow equalizing hole; 1232. a first flow equalizing surface; 1233. a second flow equalizing surface; 1234. a flow resistance surface; 1235. a flow equalizing groove; 124. a flow equalizing member; 1241. a second flow equalizing hole; 125. a first mounting groove; 126. a second mounting groove; 127. a first fixing hole; 128. a second mounting portion; 1281. a second mounting hole; 130. a fire cover; 131. fire holes; 132. an inner ring plate; 133. an outer ring plate; 134. an end plate; 135. a fire transfer hole; 136. a second fixing hole; 140. an injection pipe; 150. an ignition assembly; 160. and a seal.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In one embodiment, referring to fig. 1, fig. 2 and fig. 3, a combustion apparatus 100 includes a base 110, a flow equalizer 120, a fire cover 130 and an ejector tube 140. The base 110 is provided with a mixing chamber 111, a connection port 1141, and a first air flow passage 112. One mixing cavity 111 of any two adjacent mixing cavities 111 is arranged outside the other mixing cavity 111 in a surrounding manner, and the mixing cavity 111 is communicated with at least one connecting port 1141. The first air flow passage 112 is located between two adjacent mixing chambers 111. The flow equalizer 120 is stacked on the base 110, and the flow equalizer 120 is provided with a flow mixing groove 121 communicated with the mixing chamber 111 and a second air flow passage 122 communicated with the first air flow passage 112. One mixing groove 121 of any two adjacent mixing grooves 121 is arranged outside the other mixing groove 121 in a surrounding manner. The second air flow passage 122 is located between two adjacent mixing grooves 121. The flow equalizer 120 or the base 110 is provided with a flow equalizing boss 123, and at least a part of the flow equalizing boss 123 is located in the mixing cavity 111 and is arranged opposite to the connecting port 1141. The fire cover 130 is provided with a fire hole 131 communicated with the mixing groove 121, and the fire cover 130 covers the notch of the mixing groove 121. The ejector pipe 140 communicates with the connection port 1141.

In the combustion device 100, in the use process, the injection pipe 140 inputs the mixed gas into the mixing cavity 111 from the connecting port 1141, and since a part of the flow equalizing boss 123 is located in the mixing cavity 111 and is arranged opposite to the connecting port 1141, the mixed gas flowing out of the connecting port 1141 does not directly flow into the flow mixing grooves 121 in the flow equalizer 120 under the flow-blocking effect of the flow equalizing boss 123, but is distributed to the surrounding mixing cavity 111, so that the gas and the air are fully mixed in the mixing cavity 111, and meanwhile, the mixed gas is guaranteed to be distributed in the mixing cavity 111 in a balanced manner; after mixing, the air current flows into mixing groove 121 from mixing chamber 111 for gas and air mix again and distribute, and the gas mixture who guarantees fire hole 131 exhaust mixes with the distribution is balanced, thereby effectively promotes flame combustion's stability. Meanwhile, the mixing cavity 111 and the mixing cavity 111, the mixed flow groove 121 and the mixed flow groove 121, the first air flow passage 112 and the first air flow passage 112, and the second air flow passage 122 are independent of each other, so that air supply in each layer of the mixing cavity 111 and the mixed flow groove 121 can be independently controlled in the use process, the combustion device 100 can realize sectional combustion, and the requirements of different loads of users can be greatly met.

It should be noted that the flow equalizing boss 123 may be disposed on the flow equalizer 120, and may also be disposed on the base 110. When the flow equalizing boss 123 is arranged on the flow equalizer 120, a part of the flow equalizing boss 123 can extend into the mixing cavity 111, and the flow equalizing boss 123 is arranged opposite to the connecting port 1141, that is, the flow equalizing boss 123 is positioned above the connecting port 1141; when the flow equalizing boss 123 is disposed on the base 110, the flow equalizing boss 123 may be mounted on the cavity wall of the mixing cavity 111 and disposed opposite to the connection port 1141 at an interval. In addition, the flow equalizing boss 123 may or may not be provided with a through hole. When the flow equalizing boss 123 is provided with the through hole, part of the air flow can pass through the flow mixing groove 121 on the side back to the connecting port 141 by flowing into the flow equalizing boss 123, so as to ensure that the air flow in the flow mixing groove 121 is uniformly distributed; when the flow equalizing boss 123 is not provided with a through hole, part of the air flow bypasses the flow equalizing boss 123 and flows to the flow mixing groove 121 on the side of the flow equalizing boss 123 opposite to the connecting port 141.

Specifically, referring to fig. 3, the flow equalizing bosses 123 are disposed on the flow equalizer 120, and each flow equalizing groove 121 is disposed opposite to at least one flow equalizing boss 123, that is, at least one flow equalizing boss 123 is disposed on one side of each flow equalizing groove 121 facing the base 110, when the flow equalizing grooves 121 are communicated with the mixing cavity 111, the flow equalizing bosses 123 are separated between the connecting ports 1141 and the flow equalizing grooves 121, so as to prevent the mixed air flow from directly flowing into the flow equalizing grooves 121.

It should be noted that, when one mixing cavity 111 of any two adjacent mixing cavities 111 is annularly arranged outside the other mixing cavity 111, it should be understood that: the mixing chamber 111 is an annular chamber, and at least two annular chambers are sleeved with each other from inside to outside. Similarly, if one mixing groove 121 of any two adjacent mixing grooves 121 is arranged outside the other mixing groove 121, it should be understood that: the mixing groove 121 is an annular groove body, and at least two annular groove bodies are sleeved with each other from inside to outside. In addition, the first air flow channel 112 and the second air flow channel 122 of the present embodiment can both provide secondary air for gas combustion, so as to ensure complete combustion of the gas.

Alternatively, the annular shape of the mixing chamber 111 may be designed as a circular ring, an elliptical ring, a square ring, a pentagonal ring, or the like. The annular shape of the mixing channel 121 can also be designed as a circular ring, an oval ring, a square ring, a pentagonal ring, etc.

Specifically, referring to fig. 2, the ring shape of the mixing cavity 111 and the ring shape of the mixing groove 121 are both circular rings, so that the mixing cavity is more easily applied to a cylindrical or cylindrical hot water device structure, thereby facilitating the miniaturization of the hot water device structure. In addition, the fire holes 131 are disposed on a side of the fire cover 130 facing away from the flow equalizer 120, that is, the air outlet direction of the burner 100 of the present embodiment is vertically upward.

It should be further noted that the ejector tube 140 of the present embodiment has a venturi chamber structure. One mixing chamber 111 corresponds to at least one ejector tube 140. In addition, when the combustion apparatus 100 of the present embodiment is used in a gas-fired water heating device, it can be installed in a vertical or inverted manner in the whole water heating device.

Specifically, referring to fig. 4, the mixing cavity 111 is communicated with two connecting ports 1141, and the two connecting ports 1141 are respectively arranged symmetrically with the center of the mixing cavity 111. Meanwhile, the mixing chamber 111 is correspondingly communicated with the two injection pipes 140.

In one embodiment, referring to fig. 2, three mixing cavities 111 and three mixing grooves 121 are provided, the three mixing cavities 111 are sequentially spaced from inside to outside and surrounded, and the three mixing grooves 121 are sequentially spaced from inside to outside and surrounded. Therefore, when the fuel is burnt under a small load, the injection pipe 140 is used for ventilating the mixing cavity 111 at the innermost layer, and the fuel gas is ignited and burnt on the fire cover 130 at the innermost layer; when the fuel is in a medium load, the electromagnetic valve switch is started, the mixing cavity 111 of the middle layer is ventilated through the injection pipe 140, and fuel gas is ignited and combusted on the fire cover 130 of the middle layer; during heavy load, start heavy load solenoid valve switch, at this moment, through ejector to outermost hybrid chamber 111 air feed, the gas is at outermost fire lid 130 ignition burning, so, realizes the burning demand of three kinds of different loads.

In one embodiment, referring to fig. 4, the flow equalizing boss 123 is provided with a flow equalizing surface 1234, and a first flow equalizing surface 1232 and a second flow equalizing surface 1233 respectively located at two opposite sides of the flow equalizing surface 1234. The choke surface 1234 is disposed opposite the connection port 1141. The first flow equalizing surface 1232, the flow blocking surface 1234 and the second flow equalizing surface 1233 are sequentially distributed along the annular direction of the mixing groove 121. Therefore, when the gas flows out from the connection port 1141, the gas first impacts on the flow blocking surface 1234 to prevent the gas from directly flowing into the mixed flow groove 121; then, the fuel gas is respectively divided into two sides of the mixing cavity 111 under the action of the first flow equalizing surface 1232 and the second flow equalizing surface 1233, so that the fuel gas is distributed in the mixing cavity 111 uniformly.

It should be noted that the distribution of the first flow equalizing surface 1232, the flow blocking surface 1234 and the second flow equalizing surface 1233 along the annular direction of the flow mixing groove 121 in sequence is understood as follows: the mixing groove 121 is an annular groove, and the first flow equalizing surface 1232, the flow blocking surface 1234 and the second flow equalizing surface 1233 are respectively located on the flow equalizing boss 123 in an annular flowing direction of the air flow in the mixing chamber 111, so that the air flow on the flow blocking surface 1234 can flow through the first flow equalizing surface 1232 and the second flow equalizing surface 1233 respectively after being divided. To facilitate understanding of the annular direction of the mixing groove 121 in the present embodiment, taking fig. 8 as an example, the annular direction of the mixing groove 121 is the direction indicated by any arrow S in fig. 8.

Further, referring to fig. 4, the distance between the first flow equalizing surface 1232 and the second flow equalizing surface 1233 gradually increases from the side of the flow equalizing boss 123 close to the flow blocking surface 1234 to the side of the flow equalizing boss 123 far away from the flow blocking surface 1234. So, the boss 123 that flow equalizes of this embodiment is for or is approximate to the inverted trapezoid for the air current that is choked the flow carries out stable reposition of redundant personnel under the effect of first surface 1232 and the second surface 1233 of flow equalizing, guarantees that gas distributes in hybrid chamber 111 balancedly.

Optionally, the first flow equalizing surface 1232 and the second flow equalizing surface 1233 are both inclined planes, convex arc surfaces, stepped surfaces, or the like.

In one embodiment, referring to fig. 8, the flow blocking surface 1234 may have a first flow equalizing hole 1231. The first flow equalizing hole 1231 is communicated with the flow mixing groove 121. When the mixture of the fuel gas and the air flows out of the connecting port 1141, part of the mixture is divided under the action of the flow equalizing boss 123; another portion of the mixture flows from the first flow equalizing holes 1231 into the mixing groove 121.

Further, referring to fig. 8, a plurality of first flow equalizing holes 1231 are provided, and the plurality of first flow equalizing holes 1231 are spaced apart from each other on the flow blocking surface 1234.

In one embodiment, the flow equalizing groove 1235 is opened on a side surface of the flow equalizing boss 123 facing the inside of the flow equalizing groove 121. The first flow equalizing hole 1231, the flow equalizing groove 1235 and the flow mixing groove 121 are sequentially communicated. In a section of the flow equalizing groove 1235 close to the flow equalizing groove 121, the flow cross-sectional area a of the flow equalizing groove 1235 increases from the inside of the flow equalizing groove 1235 to the notch of the flow equalizing groove 1235. Therefore, the flow equalizing groove 1235 is of a flaring structure towards the notch of the flow equalizing groove 121, and when the airflow flows into the flow equalizing groove 1235 from the first flow equalizing hole 1231, the airflow flows into the flow equalizing groove 1235 in a diffusion manner under the drainage effect of the flaring notch of the flow equalizing groove 1235, so that the airflow in the flow equalizing groove 121 is ensured to be uniformly dispersed.

It should be noted that the flow cross section refers to a cross section obtained by intercepting the flow equalizing groove 1235 in a plane perpendicular to the flow direction of the airflow in the flow equalizing groove 1235; also understood as a cross-section orthogonal to all streamlines of the flow or total flow, and the specific configuration can be seen with reference to fig. 3.

It should be further noted that the increasing trend of the flow cross-sectional area a of the flow equalizing groove 1235 from the inside of the flow equalizing groove 1235 to the notch of the flow equalizing groove 1235 is to be understood as follows: the flow cross-section area A of the flow equalizing groove 1235 gradually increases from the inside of the flow equalizing groove 1235 to the notch of the flow equalizing groove 1235; or, the flow cross-sectional area a of the flow equalizing groove 1235 is increased from the inside of the flow equalizing groove 1235 to the notch of the flow equalizing groove 1235, and then is not changed, and finally is increased.

In one embodiment, referring to fig. 8, a flow equalizing member 124 is disposed between the walls of the flow mixing slots 121. Flow equalize 124 and extend the setting along the annular direction in mixing groove 121, flow equalize and be equipped with the second hole 1241 that flow equalizes on 124, so, the gas mixture that gets into in mixing groove 121 evenly flows to fire lid 130 under the effect in the hole that flow equalizes, and the pressure of balanced gas in fire lid 130 for the flame burning on fire lid 130 is more stable, even.

It should be noted that the mixed flow groove 121 is an annular groove body. To facilitate understanding of the annular direction of the mixing groove 121 in the present embodiment, taking fig. 8 as an example, the annular direction of the mixing groove 121 is the direction indicated by any arrow S in fig. 8.

Further, referring to fig. 8, at least two flow equalizing bosses 123 are disposed on the notches of the flow equalizing groove 121 at intervals, and the flow equalizing member 124 is disposed between two adjacent flow equalizing bosses 123, so as to further ensure the air flow distribution in the flow equalizing groove 121 to be balanced.

Further, referring to fig. 8, a plurality of second flow equalizing holes 1241 are provided, and a plurality of second flow equalizing holes 1241 are disposed on the flow equalizing member 124 at intervals. The shape of the second flow equalizing hole 1241 may be circular, strip-shaped hole, polygonal, etc.

In one embodiment, referring to fig. 9 and 10, a first installation groove 125 and a second installation groove 126 are formed in the mixing groove 121. The first mounting groove 125 is extended along an inner groove wall 1211 of the mixing groove 121. The second mounting groove 126 extends along the outer groove wall 1212 of the mixing groove 121, and the inner ring plate 132 and the outer ring plate 133 of the fire lid 130 are respectively inserted into the first mounting groove 125 and the second mounting groove 126. Therefore, the two opposite sides of the flow mixing groove 121 of the present embodiment are provided with mounting grooves, when the fire cover 130 is mounted on the flow equalizer 120, the inner ring plate 132 of the fire cover 130 is clamped into the first mounting groove 125, and the outer ring plate 133 of the fire cover 130 is clamped into the second mounting groove 126, so that the fire cover 130 is stably mounted on the flow equalizer 120, and the stable flow of the air stream into the fire cover 130 is ensured. Meanwhile, the air tightness between the fire cover 130 and the flow equalizer 120 is also improved.

It should be noted that the fire cover 130 of the present embodiment is required to cover the notch of the annular flow mixing groove 121, and therefore, the fire cover 130 is of an annular structure, the fire cover 130 includes an end plate 134, an inner ring plate 132 and an outer ring plate 133, the end plate 134 is disposed between the inner ring plate 132 and the outer ring plate 133, and the fire holes 131 are opened on the end plate 134. The outer ring plate 133 is disposed around the periphery of the inner ring plate 132.

It should be noted that the inner groove wall 1211 and the outer groove wall 1212 of the mixed flow groove 121 are understood as follows: the mixing groove 121 is an annular groove body and has an inner annular plate 132 and an outer annular plate 133, an inner groove wall 1211 of the mixing groove 121 corresponds to the inner annular plate 132 of the annular groove body, and an outer groove wall 1212 of the mixing groove 121 corresponds to the outer annular plate 133 of the annular groove body.

Optionally, the fire cover 130 may be made of metal plate, ceramic, aluminum alloy, or the like.

Further, referring to fig. 8, a first fixing hole 127 is disposed on a groove wall of the first mounting groove 125 or the second mounting groove 126, and a second fixing hole 136 disposed opposite to the first fixing hole 127 is disposed on the inner ring plate 132 or the outer ring plate 133, so that in an assembling process, a bolt, a screw or a pin is respectively inserted into the first fixing hole 127 and the second fixing hole 136, so that the fire cover 130 is more stably mounted on the flow equalizer 120.

In one embodiment, referring to fig. 1, of any two adjacent fire covers 130, one fire cover 130 located at the inner circle is raised relative to one fire cover 130 located at the outer circle. Therefore, the innermost fire cover 130 is the highest on the flow equalizer 120, the outermost fire cover 130 is the lowest on the flow equalizer 120 and gradually increases from outside to inside, so that the overall arc-surface combustion of flame after gas combustion is ensured, the combustion of gas is ensured to be more sufficient, and the combustion efficiency is improved.

It should be noted that the inconsistent height of each layer of fire cover 130 can be realized by designing the height of each layer of flow equalizer 120 to be different heights; the height of the fire cover 130 itself may be designed to be inconsistent.

Further, referring to fig. 7, the groove depths of the at least two mixing grooves 121 on the flow equalizer 120 are gradually increased from the outside to the inside, so as to ensure that the correspondingly installed fire cover 130 is gradually increased from the outside to the inside.

It should be noted that from outside to inside: the fire cover 130 is an annular structure, and after the combustion apparatus 100 is assembled, the fire cover 130 is disposed in a ring-by-ring manner, so that the direction from the fire cover 130 located at the outermost circle to the fire cover 130 located at the innermost circle is from the outside to the inside.

In one embodiment, referring to fig. 10, the fire cover 130 is provided with fire holes 135 on the side thereof. In this way, the gas on each fire cover 130 can be rapidly ignited through the fire transfer holes 135.

Specifically, referring to fig. 10, the fire holes 135 penetrate through the inner ring plate 132 and the outer ring plate 133 of the fire cover 130.

In one embodiment, referring to fig. 5 and 8, a first mounting portion 117 is disposed on an inner wall of the first air flow channel 112. The first mounting portion 117 is provided with a first mounting hole 1171. The inner wall of the second air flow passage 122 is provided with a second mounting portion 128. The second mounting portion 128 is provided with a second mounting hole 1281 opposite the first mounting hole 1171. In the assembling process, when the flow equalizer 120 is placed on the base 110, bolts, screws or pins are inserted into the first mounting hole 1171 and the second mounting hole 1281, respectively, so that the flow equalizer 120 and the base 110 are stably combined. Meanwhile, the installation parts are respectively arranged in the first air flow channel 112 and the second air flow channel 122, so that certain turbulence effect is provided for the air flow in the first air flow channel 112 and the air flow in the second air flow channel 122, the air flow rate at the position is reduced, and stable fire transfer between flames on the fire cover 130 is facilitated.

Specifically, referring to fig. 5 and 8, the first mounting portions 117 and the second mounting portions 128 are both block-shaped structures, and the first mounting portions 117 and the second mounting portions 128 are both multiple, the multiple first mounting portions 117 are disposed at intervals in the first air flow channel 112, and the multiple second mounting portions 128 are disposed at intervals in the second air flow channel 122.

In one embodiment, referring to FIG. 2, the combustion apparatus 100 further comprises a seal 160. The sealing member 160 is disposed between the base 110 and the flow equalizer 120, so that the sealing member 160 ensures the close connection between the flow equalizer 120 and the base 110, improves the air tightness therebetween, and prevents the combustion apparatus 100 from leaking air.

It should be noted that the sealing member 160 is disposed between the flow equalizer 120 and the base 110, and therefore, a plurality of holes are disposed on the sealing member 160 to correspond to the mixing cavity 111, the first air flow passage 112, the mixing groove 121, and the second air flow passage 122, respectively.

In one embodiment, referring to fig. 1, the combustion apparatus 100 further comprises an ignition assembly 150. The base 110 is further provided with a third air flow channel 113, the third air flow channel 113 is located in the enclosure of the innermost mixing cavity 111, the third air flow channel 113 penetrates through the current equalizer 120, and the ignition assembly 150 is installed in the third air flow channel 113, so that the ignition assembly 150 can conveniently ignite the fuel gas on the ignition cover 130.

In one embodiment, referring to fig. 1, at least two adjusting holes 115 are further formed on the base 110. At least two adjusting holes 115 are arranged at intervals on the periphery of the outermost mixing cavity 111, and extra air is provided for combustion on the fire cover 130 through the adjusting holes 115, so that sufficient combustion of fuel gas is guaranteed.

In one embodiment, referring to fig. 1, the base 110 is further provided with a third mounting hole 116, and the third mounting hole 116 is used for connecting the base 110 to the heat exchanger.

In one embodiment, referring to fig. 6, a flow guiding portion 114 is disposed on a side of the base 110 facing the ejector tube 140, a connection port 1141 and a flow guiding cavity 1142 are disposed on the flow guiding portion 114, and the connection port 1141 is communicated with the mixing cavity 111 through the flow guiding cavity 1142. Meanwhile, the space size of the diversion cavity 1142 gradually increases from one side of the connection port 1141 to one side of the mixing cavity 111, and is a gradually-changing annular cavity, so that the flow resistance of the air flow is reduced, and the loss of the gas pressure is effectively reduced.

Specifically, referring to fig. 6, the flow guiding portion 114 is or is approximately in an inverted triangle structure.

In an embodiment, please refer to fig. 1, fig. 2 and fig. 3, a gas-fired water heating apparatus includes the combustion device 100 in any one of the above embodiments.

In the above gas water heating apparatus, with the above combustion apparatus 100, in the use process, the injection pipe 140 is used to input the mixed gas into the mixing cavity 111 from the connection port 1141, and since a part of the flow equalizing boss 123 is located in the mixing cavity 111 and is arranged opposite to the connection port 1141, the mixed gas flowing out from the connection port 1141 does not directly flow into the flow mixing grooves 121 in the flow equalizer 120 under the flow-blocking effect of the flow equalizing boss 123, but is divided into the peripheral mixing cavities 111, so that the gas and the air are fully mixed in the mixing cavity 111, and meanwhile, the gas after mixing is distributed in the mixing cavity 111 in a balanced manner; after mixing, the air current flows into mixing groove 121 from mixing chamber 111 for gas and air mix again and distribute, and the gas mixture who guarantees fire hole 131 exhaust mixes with the distribution is balanced, thereby effectively promotes flame combustion's stability. Meanwhile, the mixing cavity 111 and the mixing cavity 111, the mixed flow groove 121 and the mixed flow groove 121, the first air flow passage 112 and the first air flow passage 112, and the second air flow passage 122 are independent of each other, so that air supply in each layer of the mixing cavity 111 and the mixed flow groove 121 can be independently controlled in the use process, the combustion device 100 can realize sectional combustion, and the requirements of different loads of users can be greatly met.

It should be noted that the combustion apparatus 100 of the present embodiment can be installed in a water heating apparatus in a vertical or inverted manner.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A combustion device, characterized in that the combustion device (100) comprises:

the air mixing device comprises a base (110), wherein a mixing cavity (111), a connecting port (1141) and a first air flow channel (112) are arranged on the base (110), one mixing cavity (111) in any two adjacent mixing cavities (111) is annularly arranged outside the other mixing cavity (111), the mixing cavity (111) is communicated with at least one connecting port (1141), and the first air flow channel (112) is positioned between the two adjacent mixing cavities (111);

the flow equalizer (120) is stacked on the base (110), a mixing groove (121) communicated with the mixing cavity (111) and a second air flow channel (122) communicated with the first air flow channel (112) are arranged on the flow equalizer (120), one mixing groove (121) of any two adjacent mixing grooves (121) is annularly arranged outside the other mixing groove (121), the second air flow channel (122) is positioned between the two adjacent mixing grooves (121), a flow equalizing boss (123) is arranged on the flow equalizer (120) or the base (110), and at least one part of the flow equalizing boss (123) is positioned in the mixing cavity (111) and is arranged opposite to the connecting port (1141);

the fire cover (130), the fire cover (130) is provided with a fire hole (131) communicated with the mixing groove (121), and the fire cover (130) covers the notch of the mixing groove (121);

the injection pipe (140) is communicated with the connecting port (1141).

2. The combustion device as claimed in claim 1, wherein a flow blocking surface (1234) and a first flow blocking surface (1232) and a second flow blocking surface (1233) respectively located at two opposite sides of the flow blocking surface (1234) are provided on the flow equalizing boss (123), the flow blocking surface (1234) is opposite to the connection port (1141), and the first flow blocking surface (1232), the flow blocking surface (1234) and the second flow equalizing surface (1233) are sequentially distributed along the annular direction of the mixing groove (121).

3. The combustion apparatus as claimed in claim 2, wherein the distance between the first flow equalizing surface (1232) and the second flow equalizing surface (1233) increases from the side of the flow equalizing boss (123) near the flow blocking surface (1234) to the side of the flow equalizing boss (123) far from the flow blocking surface (1234).

4. The combustion device as claimed in claim 2, wherein the flow blocking surface (1234) is provided with a first flow equalizing hole (1231), and the first flow equalizing hole (1231) is communicated with the mixing groove (121).

5. The combustion device as claimed in claim 4, wherein the flow equalizing boss (123) is provided with a flow equalizing groove (1235) towards one side surface inside the flow equalizing groove (121), the first flow equalizing hole (1231), the flow equalizing groove (1235) and the flow equalizing groove (121) are communicated in sequence, and for a section of the flow equalizing groove (1235) close to the flow equalizing groove (121), the flow cross-sectional area A of the flow equalizing groove (1235) increases from inside the flow equalizing groove (1235) to the notch of the flow equalizing groove (1235).

6. The combustion device as claimed in claim 1, characterized in that flow equalizing members (124) are arranged between the groove walls of the flow mixing groove (121), the flow equalizing members (124) extend along the annular direction of the flow mixing groove (121), and second flow equalizing holes (1241) are arranged on the flow equalizing members (124).

7. The combustion apparatus as claimed in claim 1, wherein a first mounting groove (125) and a second mounting groove (126) are formed in the mixing groove (121), the first mounting groove (125) is extended along an inner groove wall (1211) of the mixing groove (121), the second mounting groove (126) is extended along an outer groove wall (1212) of the mixing groove (121), and an inner ring plate (132) and an outer ring plate (133) of the fire cover (130) are respectively inserted into the first mounting groove (125) and the second mounting groove (126) correspondingly; and/or the presence of a gas in the gas,

in any two adjacent fire covers (130), one fire cover (130) positioned at the inner ring is arranged in a protruding way relative to one fire cover (130) positioned at the outer ring; and/or the presence of a gas in the gas,

the side surface of the fire cover (130) is provided with a fire transfer hole (135).

8. The combustion apparatus as claimed in any one of claims 1 to 6, wherein the first air flow path (112) is provided at an inner wall thereof with a first mounting portion (117), the first mounting portion (117) is provided with a first mounting hole (1171), the second air flow path (122) is provided at an inner wall thereof with a second mounting portion (128), and the second mounting portion (128) is provided with a second mounting hole (1281) opposite to the first mounting hole (1171).

9. The combustion apparatus according to any of the claims 1-6, characterized in that the combustion apparatus (100) further comprises a seal (160), the seal (160) being arranged between the base (110) and the flow equalizer (120); and/or the presence of a gas in the gas,

the combustion device (100) further comprises an ignition assembly (150), a third air flow channel (113) is further arranged on the base (110), the third air flow channel (113) is located in the enclosure of the innermost mixing cavity (111), the third air flow channel (113) penetrates through the current equalizer (120), and the ignition assembly (150) is installed in the third air flow channel (113); and/or the presence of a gas in the gas,

the base (110) is further provided with at least two adjusting holes (115), and the at least two adjusting holes (115) are arranged at intervals on the periphery of the outermost mixing cavity (111).

10. A gas-fired water heating apparatus comprising a combustion device according to any one of claims 1 to 9.

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