CN114017775A - Gas heat exchange device and combustion chamber - Google Patents
Gas heat exchange device and combustion chamber Download PDFInfo
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- CN114017775A CN114017775A CN202111277224.3A CN202111277224A CN114017775A CN 114017775 A CN114017775 A CN 114017775A CN 202111277224 A CN202111277224 A CN 202111277224A CN 114017775 A CN114017775 A CN 114017775A
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- air
- combustion chamber
- cooling
- shell body
- cooling flow
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 54
- 238000001816 cooling Methods 0.000 claims abstract description 106
- 238000004891 communication Methods 0.000 claims description 37
- 230000007704 transition Effects 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 18
- 239000003546 flue gas Substances 0.000 abstract description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 238000012546 transfer Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/78—Cooling burner parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a gas heat exchange device and a combustion chamber, wherein high-temperature flue gas flows from bottom to top in a combustion chamber of a shell body, so that the high-temperature flue gas exchanges heat with a heat exchange assembly positioned above the combustion chamber, and further heats heat exchange media such as water. Outside air enters the cooling flow channel through the first air inlet, so that heat exchange is carried out on the air and the shell body, the shell body is cooled, and the air after heat exchange with the shell body enters the combustion cavity through the air outlet. Each cooling runner communicates through the communicating channel for air can be in smooth and easy flow between each cooling runner, is favorable to cooling each position of shell body, avoids appearing local high temperature. In addition, when the air flows in the communicating channel and passes through the narrow opening part, the flow velocity of the air is accelerated, so that the air can be promoted to circulate in two adjacent cooling flow channels, the air can be timely and effectively taken away from the heat of the shell body, and the cooling effect of the shell body is enhanced.
Description
Technical Field
The invention relates to the technical field of heat exchange, in particular to a gas heat exchange device and a combustion chamber.
Background
The gas heat exchange devices such as the gas water heater and the like heat the heat exchange media such as water and the like by utilizing the heat exchange between the high-temperature flue gas and the heat exchange assembly. The high-temperature flue gas is obtained by igniting the mixed gas of combustible gas and air in a combustion chamber of the combustion chamber. High temperature flue gas is with heat transfer to lateral wall and make the lateral wall intensification when the combustion chamber flows to damage relevant electrical components, consequently, need cool off the cooling to the combustion chamber. The cooling effect of traditional mode for adding on the lateral wall of combustion chamber and being used for the cooling water circulation cooling pipeline, this kind of mode is relatively poor.
Disclosure of Invention
The first technical problem solved by the invention is to provide a combustion chamber with good cooling effect.
The second technical problem to be solved by the invention is to provide a gas heat exchange device which has a good cooling effect.
The first technical problem is solved by the following technical scheme:
the utility model provides a combustion chamber, includes the shell body, the shell body is equipped with the cooling flow channel that burning chamber and two at least mutual intervals set up, at least one the cooling flow channel have with external first air inlet of intercommunication, at least one the cooling flow channel have with the gas outlet of burning chamber intercommunication, the shell body still is equipped with at least one intercommunication passageway, the intercommunication passageway is used for with adjacent two the cooling flow channel intercommunication, just the intercommunication passageway has the narrow mouth portion that is used for making the gas flow rate accelerate.
Compared with the background art, the combustion chamber of the invention has the following beneficial effects: during the use, the high temperature flue gas flows from bottom to top in the combustion chamber of shell body to carry out the heat transfer with the heat transfer subassembly that is located the combustion chamber top, and then heat transfer medium such as water heats. And in the air of external world gets into the cooling runner through first air inlet to carry out the heat transfer and cool down to the shell body with the shell body, the air after accomplishing the heat transfer with the shell body gets into the combustion chamber through the gas outlet. Simultaneously, each cooling runner communicates through the intercommunication passageway for the air can be in smooth and easy flow between each cooling runner, is favorable to cooling each position of shell body, avoids appearing local high temperature. In addition, when the air flows in the communicating channel and passes through the narrow opening part, the flow velocity of the air is accelerated, so that the air can be promoted to circulate in two adjacent cooling flow channels, the air can be timely and effectively taken away from the heat of the shell body, and the cooling effect of the shell body is enhanced.
In one embodiment, the shell body is further provided with a second air inlet corresponding to the communication channel and used for communicating the outside with the communication channel.
In one embodiment, the two ends of the communication channel are provided with tapered parts, the narrow opening part is arranged between the two tapered parts, and the inner diameter of any one position of the tapered parts is larger than that of the narrow opening part.
In one embodiment, the tapered portion has a decreasing inner diameter in a direction from the cooling flow passage to the narrow portion.
In one embodiment, the second air inlet is arranged corresponding to the tapered part, and the second air inlet is communicated with the tapered part; and/or the second air inlet is arranged corresponding to the narrow opening part and communicated with the narrow opening part.
In one embodiment, the inner side wall of the cooling flow passage is provided with a flow guide part.
In one embodiment, the shell body comprises at least two side faces arranged at an included angle, each side face is provided with one cooling flow channel, and the connecting transition portion between at least one group of two adjacent side faces is provided with the communication channel.
In one embodiment, the connecting transition point between two adjacent side faces is provided with at least two communication channels arranged at intervals.
In one embodiment, the housing body comprises an outer housing with three side faces and an inner housing with three side faces, the outer housing is arranged outside the inner housing and spaced from the inner housing, one side face of the outer housing and one corresponding side face of the inner housing are spaced to form the cooling flow channel, two adjacent cooling flow channels are communicated through the communication channel, the inner housing is provided with the air outlet, and the outer housing is provided with the first air inlet; the shell body further comprises a sealing cover assembly, the sealing cover assembly is connected with the outer shell and is enclosed into the combustion cavity with the inner shell, and the sealing cover assembly is provided with the cooling flow channel, the air outlet and the first air inlet.
The second technical problem is solved by the following technical solutions:
a gas heat exchange device comprises the combustion chamber.
Compared with the background technology, the gas heat exchange device of the invention has the following beneficial effects: outside air enters the cooling flow channel of the combustion chamber through the first air inlet, so that heat exchange is carried out on the air and the shell body, the shell body is cooled, and the air after heat exchange with the shell body enters the combustion chamber through the air outlet. Simultaneously, each cooling runner communicates through the intercommunication passageway for the air can be in smooth and easy flow between each cooling runner, is favorable to cooling each position of shell body, avoids appearing local high temperature. In addition, when the air flows in the communicating channel and passes through the narrow opening part, the flow velocity of the air is accelerated, so that the air can be promoted to circulate in two adjacent cooling flow channels, the air can be timely and effectively taken away from the heat of the shell body, and the cooling effect of the shell body is enhanced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
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 introduced 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 based on these drawings without creative efforts.
FIG. 1 is a schematic view of a combustor according to one embodiment;
FIG. 2 is a partial cross-sectional view of a portion of the combustion chamber A of FIG. 1;
FIG. 3 is an exploded view of the combustion chamber of FIG. 1;
FIG. 4 is a temperature profile of a conventional combustor;
FIG. 5 is a temperature profile of the combustion chamber of FIG. 1.
Reference numerals:
100. a housing body; 110. a combustion chamber; 120. a cooling flow channel; 130. a communication channel; 131. a narrow mouth portion; 132. a tapered portion; 140. a first air inlet; 150. an air outlet; 160. a second air inlet; 170. a drainage part; 181. a housing; 182. an inner shell; 190. a closure assembly; 191. and (7) a cover plate.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the 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," "secured," and the like are to be construed broadly and can, 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. 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.
It should be noted that, for better explaining the principle of the embodiment of the present application, the high temperature flue gas flowing into the combustion chamber 110 from bottom to top is taken as an example for illustration, and should not be construed as limiting or restricting the embodiment of the present application. In other embodiments, the high temperature flue gas may also enter the combustion chamber 110 in other directions or angles.
As shown in fig. 1 and 2, in one embodiment, a combustion chamber is provided, which includes a casing body 100, the casing body 100 having a combustion chamber 110 and at least two cooling channels 120 spaced apart from each other. Wherein at least one cooling flow passage 120 has a first air inlet 140 communicating with the outside, and at least one cooling flow passage 120 has an air outlet 150 communicating with the combustion chamber 110. In addition, the case body 100 is further provided with at least one communication passage 130, the communication passage 130 is used to communicate the adjacent two cooling flow passages 120, and the communication passage 130 has a narrow portion 131 for accelerating the gas flow rate.
The combustion chamber of above-mentioned embodiment, during the use, high temperature flue gas flows from bottom to top in the combustion chamber 110 of shell body 100 to carry out the heat transfer with the heat transfer assembly who is located the combustion chamber top, and then heat transfer medium such as water heats. In addition, the external air enters the cooling flow channel 120 through the first air inlet 140, so as to exchange heat with the housing body 100 to cool the housing body 100, and the air after exchanging heat with the housing body 100 enters the combustion chamber 110 through the air outlet 150. Meanwhile, each cooling flow passage 120 is communicated through the communication channel 130, so that air can smoothly flow among the cooling flow passages 120, cooling of each part of the shell body 100 is facilitated, and local high temperature is avoided. In addition, when the air flows in the communicating channel 130 and passes through the narrow opening portion 131, the flow rate of the air is accelerated, so that the air can be promoted to circulate in the two adjacent cooling flow channels 120, the air can be timely and effectively taken away from the shell body 100, and the cooling effect on the shell body 100 is enhanced.
As shown in fig. 2, optionally, the case body 100 is further provided with a second air inlet 160 corresponding to the communication passage 130 and for communicating the outside with the communication passage 130. So, when the air current flows through the slot portion 131 of the communicating channel 130, the velocity of flow accelerates to produce the pressure difference in slot portion 131, and then produce the suction, thereby through the second air inlet 160 with the outside air suction communicating channel 130 in, increased the intake air quantity, help cooling to the shell body 100. Meanwhile, the temperature of the air re-entering from the second air inlet 160 is lower than that of the air flowing in the cooling flow passage 120, and the cooling effect on the case body 100 is further improved. The second air inlet 160 corresponds to the communication channel 130, which means that the opening position of the second air inlet 160 corresponds to the sidewall of the communication channel 130, so that the air entering from the second air inlet 160 directly enters the communication channel 130.
The narrow opening portion 131 accelerates the gas flow rate, so that the gas can flow through a narrow opening or a throat with a relatively small cross-sectional area, and the flow rate can be accelerated only after the air flows through the narrow opening portion 131.
As shown in fig. 2, optionally, the communication channel 130 has tapered portions 132 at both ends, a narrow portion 131 is provided between the two tapered portions 132, and the inner diameter of any one of the tapered portions 132 (e.g. L in fig. 2)1Shown) are each larger than the inner diameter (L of fig. 2) of the narrow-mouth portion 1312Shown). Thus, when the air in the cooling channel 120 enters the communication channel 130, the air enters the tapered portion 132 and then enters the narrow portion 131. Because the internal diameter of arbitrary department of convergent portion 132 all is greater than the internal diameter of tang portion 131 for the air flows in to tang portion 131 in-process from convergent portion 132, and the flow cross section area of air is littleer and littleer, thereby forms the pressure differential at convergent portion 132 and tang portion 131, makes the velocity of flow of air constantly accelerate, and then produces the pressure differential, and air velocity is improved, is favorable to the outside air to pass through in second air inlet 160 gets into intercommunication channel 130. The cross-sectional flow area is an area of a region surrounded by the cross-sectional profile.
Wherein the tapered portion 132 may be flared such that the entire communication channel 130 is a venturi structure.
As shown in fig. 2, specifically, the inner diameter of the tapered portion 132 decreases in the direction from the cooling flow passage 120 to the narrow-mouth portion 131. So, the in-process that the air flowed into convergent 132 from cooling runner 120, the flow cross sectional area of air reduces gradually, thereby make the velocity of flow of air at convergent 132 circulation in-process start the grow promptly, further carry out the acceleration of velocity of flow until air inflow narrow part 131 department, and then help improving the velocity of flow of air, make the flow of air in cooling runner 120 more violent, can be more timely, the effectual heat with shell body 100 is taken away, the reinforcing is to shell body 100's cooling effect. The inner diameter of the tapered portion 132 decreases linearly or curvilinearly.
The opening positions and the opening number of the second air inlets 160 can be flexibly designed or adjusted according to actual use requirements.
Optionally, the second air inlet 160 is disposed corresponding to the tapered portion 132, and the second air inlet 160 is in communication with the tapered portion 132. Thus, when the air flows in the tapered portion 132, the flow velocity starts to increase, and a certain suction force can be generated, so that the outside air is sucked into the tapered portion 132 from the second air inlet 160 corresponding to the tapered portion 132, the air inflow is improved, and the cooling effect is enhanced. The second air inlet 160 corresponds to the tapered portion 132, which means that the opening position of the second air inlet 160 corresponds to the sidewall of the tapered portion 132, so that the air entering from the second air inlet 160 directly enters the tapered portion 132.
As shown in fig. 2, alternatively, the second air inlet 160 is provided corresponding to the narrow-mouth portion 131, and the second air inlet 160 communicates with the narrow-mouth portion 131. Thus, the flow velocity of the air flowing in the narrow opening portion 131 is increased, so that the suction force is generated, the air outside is sucked into the tapered portion 132 from the second air inlet 160 corresponding to the narrow opening portion 131, the air inflow is increased, and the cooling effect is enhanced. The second air inlet 160 corresponds to the narrow opening portion 131, which means that the opening position of the second air inlet 160 corresponds to the sidewall of the narrow opening portion 131, so that the air entering from the second air inlet 160 directly enters the narrow opening portion 131.
Of course, in other embodiments, there are two second air inlets 160, wherein one second air inlet 160 is disposed corresponding to the tapered portion 132, and the second air inlet 160 is communicated with the tapered portion 132; meanwhile, another second air inlet 160 is provided corresponding to the narrow opening portion 131, and the second air inlet 160 communicates with the narrow opening portion 131. Like this, the velocity of flow begins to accelerate when the air in the cooling runner 120 gets into in the convergent portion 132, thereby inhale the convergent portion 132 with outside air from the second air inlet 160 that corresponds the convergent portion 132 setting in, the velocity of flow of the air that flows into the narrow mouth portion 131 from the convergent portion 132 further accelerates, thereby further inhale the convergent portion 132 with outside air from the second air inlet 160 that corresponds the narrow mouth portion 131 setting in, promoted holistic intake air quantity, it is better to the cooling effect of shell body 100.
Alternatively, it is assumed that the average flow velocity, the average pressure and the average cross-sectional flow area of the air at the tapered portion 132 are v1、p1、S1The average flow velocity, average pressure and average cross-sectional flow area of air at the narrow-mouth portion 131 are each v2、p2、S2ρ is the density of air and Q is the flow rate of air, S1 v1＝S2v2＝Q，
Therefore, the communication channel 130 is arranged between the two adjacent cooling flow channels 120 for communication, so that the circulating flow of air between the two cooling flow channels 120 can be effectively accelerated, and the cooling effect is improved. And the arrangement of the second air inlet 160 is combined, so that the circulating flow of air between the two cooling channels 120 can be accelerated more effectively, and the cooling effect is further improved.
In order to improve the heat exchange efficiency of the air with the case body 100, optionally, the inner side wall of the cooling flow passage 120 is provided with a flow guide portion 170. So, utilize drainage portion 170 to carry out the drainage to the flow of air in cooling channel 120 for the air can carry out abundant heat transfer with shell body 100 when flowing in cooling channel 120, promotes the cooling effect. In addition, the arrangement of the drainage part 170 also increases the contact area between the shell body 100 and the air, so that the heat exchange is more sufficient, and the cooling effect is good.
Wherein, drainage portion 170 can be drainage rib or drainage sand grip, can follow vertical direction and extend, and the intensity that can also strengthen shell body 100 is strengthened, avoids warping. A gap for cold air to flow is formed between two adjacent drainage convex ribs or between two adjacent drainage convex ribs.
In addition, the extending direction of the flow guiding portion 170 may be consistent with the flowing direction of the air in the cooling flow channel 120, so as to avoid interference or influence on the air, so that the air can smoothly flow, thereby ensuring the heat exchange efficiency. For example, the flow guide portion 170 may extend in a vertical direction when air enters from the upper first air inlet 140 and flows out from the lower air outlet 150 into the combustion chamber 110, i.e., the air flows from top to bottom in the cooling flow passage 120.
The surface of the case body 100 provided with the communication passage 130 and the drain portion 170 as shown in fig. 5 has a lower temperature than the surface of the case body 100 provided with only the cooling flow passage 120 as shown in fig. 4.
The distribution of the cooling channels 120 on the housing body 100 can be flexibly designed or adjusted according to the actual processing technology or use requirement.
Optionally, the housing body 100 includes at least two angled sides, each side having a cooling flow channel 120. In this way, the cooling flow passage 120 of each side surface of the case body 100 has air flowing, so that each side surface of the case body 100 can be cooled. And, the connecting transition part between at least one group of two adjacent side surfaces is provided with a communicating channel 130. So, cooling channel 120 on two adjacent sides communicates through intercommunication passageway 130, because two adjacent sides are the contained angle setting to can cool off the bending part between two adjacent sides, avoid appearing local high temperature. The included angle between the side surfaces of the housing body 100 can be flexibly designed or adjusted according to the actual processing technology or the use requirement, and is preferably perpendicular to each other, so as to facilitate processing.
The number of the communication channels 130 between two adjacent cooling channels 120 can be flexibly designed or adjusted according to the actual processing technology or use requirement.
Optionally, at least two communication channels 130 are provided at the connecting transition between two adjacent side surfaces. In this way, at least two connecting channels arranged at intervals are used for communicating the two adjacent cooling flow channels 120, and the flow of air between the two adjacent cooling flow channels 120 is facilitated. Meanwhile, the air is accelerated by the narrow portions 131 of the at least two communication passages 130, so that the air flow passage between the adjacent two cooling flow passages 120 is more vigorous, which contributes to the enhancement of heat exchange. In addition, the second air inlet 160 correspondingly arranged on each communication channel 130 can further improve the air inflow and enhance the cooling effect.
The number of the side surfaces of the housing body 100 can be flexibly designed or adjusted according to the actual processing technology or the use requirement.
As shown in fig. 3, the case body 100 may alternatively include an outer case 181 having three sides and an inner case 182 having three sides. The outer case 181 is disposed outside the inner case 182 and spaced apart from the inner case 182. One side surface of the outer shell 181 is spaced apart from one side surface of the corresponding inner shell 182 to form the cooling flow channels 120, and the adjacent two cooling flow channels 120 are communicated with each other through the communication passage 130. The inner housing 182 is provided with an air outlet 150. The housing 181 is provided with a first air inlet 140. Thus, after the outer shell 181 and the inner shell 182 are assembled, one cooling channel 120 is formed on each of three sides, and two adjacent cooling channels 120 are communicated through the communication channel 130 at the bent portion. The housing body 100 further includes a cover assembly 190, the cover assembly 190 is connected to the outer housing 181 and encloses the inner housing 182 to form the combustion chamber 110, and the cover assembly 190 is provided with the cooling channel 120, the air outlet 150 and the first air inlet 140. In this manner, the open sides of the outer and inner shells 181, 182 are closed with the cover assembly 190, thereby enclosing the circumferentially closed combustion chamber 110 for the flow of high temperature flue gases.
As shown in fig. 3, the housing body 100 includes an inner housing 182, an outer housing 181 and a cover assembly 190, which facilitates the processing of the housing body 100 and reduces the processing difficulty. In addition, the assembly connection between the outer shell 181 and the inner shell 182 may be implemented by screw fixation, welding, or the like, for example, a first flange extending toward the outer shell 181 may be disposed at the upper end of the inner shell 182, a second flange extending toward the inner shell 182 may be disposed at the upper end of the outer shell 181, and the second flange and the first flange are attached and then fixed by welding or screw fixation, so as to implement the assembly connection between the inner shell 182 and the outer shell 181. As shown in fig. 3, in addition, the cover assembly 190 may include two cover plates 191 oppositely spaced apart from each other, the two cover plates 191 are oppositely spaced apart from each other to form the cooling channel 120, and the two cover plates 191 may be fixed to the outer shell 181 and the inner shell 182 by screws or welding. Of course, the cover plate 191 may also be provided with a corresponding flange structure to ensure the sealing of the cooling channel 120 with the outside.
Moreover, the opening positions and the opening numbers of the air inlet on the outer shell 181 and the air outlet 150 on the inner shell 182 can be flexibly designed or adjusted according to the actual use requirement. For example, each cooling flow channel 120 may be correspondingly provided with an air inlet and an air outlet 150.
In addition, the inner shell 182 and the outer shell 181 may be formed with protrusions formed by punching or the like in opposite directions, so that the cooling flow passage 120 is formed when the inner shell 182 is assembled with the outer shell 181. Similarly, the two cover plates 191 may be machined with corresponding convex hulls to form the cooling channels 120.
Of course, in other embodiments, at least two cooling channels 120 may be disposed on the same side, and two adjacent cooling channels 120 are communicated with each other through at least one communication channel 130.
In one embodiment, a gas heat exchange device is further provided, which comprises the combustion chamber in any of the above embodiments.
In the gas heat exchanger of the above embodiment, the external air enters the cooling flow channel 120 of the combustion chamber through the first air inlet 140, so as to exchange heat with the shell body 100 to cool the shell body 100, and the air after exchanging heat with the shell body 100 enters the combustion chamber 110 through the air outlet 150. Meanwhile, each cooling flow passage 120 is communicated through the communication channel 130, so that air can smoothly flow among the cooling flow passages 120, cooling of each part of the shell body 100 is facilitated, and local high temperature is avoided. In addition, when the air flows in the communicating channel 130 and passes through the narrow opening portion 131, the flow rate of the air is accelerated, so that the air can be promoted to circulate in the two adjacent cooling flow channels 120, the air can be timely and effectively taken away from the shell body 100, and the cooling effect on the shell body 100 is enhanced.
It should be noted that the gas heat exchange device may further include a heat exchanger, a fan, and other components, which are not described herein again because they belong to the prior art.
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 express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The combustion chamber is characterized by comprising a shell body (100), wherein the shell body (100) is provided with a combustion cavity (110) and at least two cooling flow passages (120) which are arranged at intervals, at least one cooling flow passage (120) is provided with a first air inlet (140) communicated with the outside, at least one cooling flow passage (120) is provided with an air outlet (150) communicated with the combustion cavity (110), the shell body (100) is further provided with at least one communicating channel (130), the communicating channel (130) is used for communicating the two adjacent cooling flow passages (120), and the communicating channel (130) is provided with a narrow opening part (131) used for accelerating the flow rate of gas.
2. The combustion chamber as claimed in claim 1, wherein the case body (100) is further provided with a second intake port (160) corresponding to the communication passage (130) and for communicating the outside with the communication passage (130).
3. The combustion chamber as claimed in claim 2, wherein both ends of the communication passage (130) have tapered portions (132), the two tapered portions (132) have the narrow portion (131) therebetween, and an inner diameter of any one of the tapered portions (132) is larger than that of the narrow portion (131).
4. A combustion chamber according to claim 3, characterized in that the inner diameter of the tapered portion (132) decreases in the direction from the cooling flow channel (120) to the narrow portion (131).
5. The combustion chamber as claimed in claim 3, characterized in that the second intake port (160) is provided in correspondence of the tapered portion (132), and the second intake port (160) communicates with the tapered portion (132); and/or the second air inlet (160) is arranged corresponding to the narrow opening part (131), and the second air inlet (160) is communicated with the narrow opening part (131).
6. A combustion chamber according to any of claims 1-5, characterized in that the inner side wall of the cooling flow channel (120) is provided with a flow guide (170).
7. A combustion chamber according to any of claims 1-5, characterized in that the housing body (100) comprises at least two angularly arranged side surfaces, each side surface being provided with one of the cooling channels (120), and that the connecting transition between at least one group of two adjacent side surfaces is provided with the communication channel (130).
8. The combustion chamber as set forth in claim 7, characterized in that the connecting transition between two adjacent side surfaces is provided with at least two of the communication passages (130) arranged at intervals.
9. The combustion chamber as claimed in claim 7, wherein the casing body (100) comprises an outer casing (181) having three said sides and an inner casing (182) having three said sides, the outer casing (181) is disposed outside the inner casing (182) and spaced apart from the inner casing (182), and one said side of the outer casing (181) is spaced apart from one said side of the corresponding inner casing (182) to form the cooling flow channel (120), two adjacent cooling flow channels (120) are communicated through the communication channel (130), the inner casing (182) is provided with the air outlet (150), and the outer casing (181) is provided with the first air inlet (140); the shell body (100) further comprises a cover assembly (190), the cover assembly (190) is connected with the outer shell (181) and enclosed into the combustion chamber (110) with the inner shell (182), and the cover assembly (190) is provided with the cooling flow passage (120), the air outlet (150) and the first air inlet (140).
10. A gas heat exchange device comprising a combustion chamber as claimed in any one of claims 1 to 9.
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| CN202111277224.3A CN114017775B (en) | 2021-10-29 | 2021-10-29 | Gas heat exchange device and combustion chamber |
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| CN202111277224.3A CN114017775B (en) | 2021-10-29 | 2021-10-29 | Gas heat exchange device and combustion chamber |
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| CN114017775B CN114017775B (en) | 2024-08-13 |
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| CN213657133U (en) * | 2020-09-18 | 2021-07-09 | 宁波方太厨具有限公司 | Combustion chamber shell and combustion chamber comprising same |
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| JP2014202382A (en) * | 2013-04-02 | 2014-10-27 | リンナイ株式会社 | Heating cooker |
| US20180031273A1 (en) * | 2016-07-28 | 2018-02-01 | A.O. Smith (China) Water Heater Co., Ltd. | Condensing gas water heater, condensing heat exchanger and heat exchanger plate |
| CN208090966U (en) * | 2018-03-07 | 2018-11-13 | 广东万和新电气股份有限公司 | A kind of air inlet cooling structure and gas heater for gas heater |
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| CN114017775B (en) | 2024-08-13 |
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