CN113137752A - Combustion heat exchange assembly and combustion heat exchange equipment - Google Patents
Combustion heat exchange assembly and combustion heat exchange equipment Download PDFInfo
- Publication number
- CN113137752A CN113137752A CN202010065832.7A CN202010065832A CN113137752A CN 113137752 A CN113137752 A CN 113137752A CN 202010065832 A CN202010065832 A CN 202010065832A CN 113137752 A CN113137752 A CN 113137752A
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- heat exchange
- thermocouple
- combustor
- burner
- combustion heat
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 65
- 238000009434 installation Methods 0.000 claims description 64
- 238000005192 partition Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 230000000903 blocking effect Effects 0.000 description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 239000002737 fuel gas Substances 0.000 description 6
- 238000007084 catalytic combustion reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 241000886569 Cyprogenia stegaria Species 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Classifications
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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
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- 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
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- 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
- F23D14/62—Mixing devices; Mixing tubes
-
- 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
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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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)
- Gas Burners (AREA)
Abstract
The invention discloses a combustion heat exchange assembly and combustion heat exchange equipment. This burning heat transfer subassembly includes: the heat exchanger is provided with a shell, a heat exchange part is arranged in the shell, a heat exchange medium channel is arranged in the heat exchange part, and a first combustor mounting space is formed in the shell; a thermocouple; the first combustor is at least partially arranged in the first combustor mounting space, a thermocouple mounting part is arranged on the first combustor, and the thermocouple is suitable for being located in the thermocouple mounting part. According to the combustion heat exchange assembly, the thermocouple is arranged in the thermocouple mounting part, so that the temperature in the cavity is not influenced when the thermocouple is sensitively monitored, the thermocouple is prevented from being in a high-temperature environment for a long time, meanwhile, the thermocouple mounting part can support the thermocouple, the service life of the thermocouple is prolonged, and the cost of the thermocouple is reduced.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a combustion heat exchange assembly and combustion heat exchange equipment.
Background
At present, some water heaters heat water flowing through a heat exchanger by combining a first burner and a second burner, but the mounting and supporting structures of the first burner and the second burner are easily subjected to high-temperature deformation due to long-term high-temperature environments, so that the first burner and the second burner are unreliable in mounting.
In addition, in order to satisfy a good combustion effect, a certain distance needs to be kept between the first burner and the second burner, and the distance between the first burner and the second burner is difficult to keep constant due to high-temperature deformation of the mounting support structure during the use of the existing water heater, so that the combustion effect is influenced.
Meanwhile, when the mixed gas of air and fuel gas passes through the first burner in a large amount or the linear velocity of the mixed gas passing through the first burner is low, a backfire phenomenon may occur in the first burner. The thermocouple is located in the cavity above the first burner, which results in higher requirements on the high temperature resistance of the thermocouple and increases the cost of the thermocouple.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the invention provides a combustion heat exchange assembly which can reduce the requirement on the high-temperature resistance of a thermocouple and save the cost of the thermocouple.
The invention also provides combustion heat exchange equipment with the combustion heat exchange assembly.
The combustion heat exchange assembly according to the embodiment of the invention comprises: the heat exchanger is provided with a shell, a heat exchange part is arranged in the shell, a heat exchange medium channel is arranged in the heat exchange part, and a first combustor mounting space is formed in the shell; a thermocouple; the first combustor is at least partially arranged in the first combustor mounting space, a thermocouple mounting part is arranged on the first combustor, and the thermocouple is suitable for being located in the thermocouple mounting part.
According to the combustion heat exchange assembly provided by the embodiment of the invention, the thermocouple is arranged in the thermocouple mounting part, so that the temperature in the cavity is not influenced when the thermocouple is sensitively monitored, the thermocouple is prevented from being in a high-temperature environment for a long time, meanwhile, the thermocouple mounting part can also support the thermocouple, the service life of the thermocouple is prolonged, and the cost of the thermocouple is reduced.
According to some embodiments of the invention, the thermocouple mounting portion is a thermocouple recess, and the thermocouple is adapted to be located in the thermocouple recess.
According to some embodiments of the invention, a second burner installation space is formed in the housing, the second burner installation space being located above the first burner installation space, a second burner being at least partially disposed within the second burner installation space.
According to some embodiments of the invention, the first burner installation space and the second burner installation space are both defined by the heat exchanging part.
According to some embodiments of the present invention, the heat exchanging part includes a stopper heat exchanging part disposed at a top of the first burner installation space, and the top of the first burner is stopped and limited by the stopper heat exchanging part.
According to some embodiments of the invention, the heat exchanging part comprises: and the installation heat exchange part is arranged in the installation space of the second combustor, and the second combustor is limited by the installation heat exchange part.
Specifically, the installation heat exchange portion includes: the supporting heat exchange part is positioned at the bottom of the second combustor mounting space and is used for supporting and arranging the second combustor in the second combustor mounting space; and the limiting heat exchange part is positioned on two sides and/or the top of the second combustor mounting space and is used for limiting the second combustor in the second combustor mounting space.
According to some embodiments of the present invention, the housing is provided with a thermocouple mounting hole, and the thermocouple is inserted into the thermocouple mounting portion after passing through the thermocouple mounting hole.
Optionally, the thermocouple installation part is located inside the first combustor, and the inlet end of the thermocouple installation part is located on the side surface of the first combustor and right faces the thermocouple installation hole.
Optionally, the thermocouple installation part is located on the upper surface of the first combustor, and the inlet end of the thermocouple installation part is located on the side surface of the first combustor and right faces the thermocouple installation hole.
According to another aspect of the invention, the combustion heat exchange device comprises a premixing cavity and the combustion heat exchange assembly, wherein the premixing cavity is arranged below the first combustor, and the premixing cavity is provided with a gas flow passage communicated with the heat exchanger.
According to some embodiments of the invention, the premix chamber has a first burner positioning portion at which the first burner is positioned.
According to some embodiments of the invention, the combustion heat exchange device further comprises: the screen plate is arranged between the first combustor and the premixing cavity and provided with a plurality of criss-cross separating ribs, and the first combustor is divided into a plurality of air inlet areas by the separating ribs.
The partition rib includes: the air inlet structure comprises a plurality of transverse separating ribs and a plurality of longitudinal separating ribs, wherein the transverse separating ribs and the longitudinal separating ribs are arranged in a crossed mode to form a plurality of rectangular air inlet areas.
Alternatively, the intake areas of the plurality of intake regions are equal.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a cross-sectional view of a recuperator, a first combustor, a second combustor, a premix chamber;
FIG. 2 is a schematic perspective view of a first burner;
FIG. 3 is a schematic view of the assembly of the recuperator, the first combustor, the thermocouple, and the premix chamber;
FIG. 4 is an exploded schematic view of the first burner, screen, premix chamber;
FIG. 5 is a top view of a first burner, screen;
FIG. 6 is a schematic view of a combustion heat exchange apparatus.
Reference numerals:
the heat exchanger 10, the casing 1, the second burner installation space 11, the first burner installation space 12, the heat exchange portion 2, the stopper heat exchange portion 21, the installation heat exchange portion 24, the support heat exchange portion 22, the middle group support heat exchange portion 221, the first side group support heat exchange portion 222, the second side group support heat exchange portion 223, the lower heat exchange tube 224, the limit heat exchange portion 23, the flue gas flow channel 7, the second burner 20, the first burner 30, the thermocouple installation portion 301, the vent hole 302, the premix chamber 40, the thermocouple 50, the mesh plate 60, the partition rib 601, the air intake region 602, the smoke collecting hood 70, the blower unit 81, the gas proportional valve 82, the controller 83, the air inlet 84, and the gas inlet 85.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
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 connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The combustion heat exchange assembly according to an embodiment of the present invention is described in detail below with reference to fig. 1 to 6.
Referring to fig. 1 to 3, a combustion heat exchange assembly according to an embodiment of the present invention includes: the heat exchanger 10 comprises a shell 1, a heat exchanging part 2 is arranged in the shell 1, a heat exchanging medium channel is arranged in the heat exchanging part 2, and water is suitable for flowing in the heat exchanging medium channel. In other words, the heat exchange portion 2 is a tubular structure, a water path communicated with the water inlet pipe and the water outlet pipe is formed in the tubular structure, and cold water in the water inlet pipe is heated in the heat exchange portion 2 and then flows out of the water outlet pipe.
A flue gas flow channel 7 is formed in the shell 1, a first combustor mounting space 12 is formed in the flue gas flow channel 7, and the first combustor 30 is at least partially arranged in the first combustor mounting space 12, so that high-temperature hot gas of the first combustor 30 can enter the flue gas flow channel 7 more, and the utilization rate of heat is improved.
The first burner 30 is provided with a thermocouple installation part 301, and the thermocouple 50 is adapted to be located in the thermocouple installation part 301. The thermocouple 50 is used to detect the temperature of the cavity in the housing 1, and if the thermocouple 50 is directly exposed to the high temperature cavity above the first burner 30, the measuring end of the thermocouple 50 is suspended, so that the thermocouple 50 is unevenly stressed, and the service life of the thermocouple 50 is affected. After the thermocouple 50 is placed on the thermocouple installation part 301, the thermocouple installation part 301 may support the thermocouple 50, thereby reducing the probability of damage to the thermocouple 50.
The thermocouple 50 placed at the thermocouple mounting portion 301 can sensitively monitor the temperature in the cavity, so that the monitoring effect is ensured, and the thermocouple 50 can be prevented from being located in a high-temperature environment of the cavity above the first combustor 30 for a long time, thereby being beneficial to prolonging the service life of the thermocouple 50 and reducing the cost of the thermocouple 50 (the higher the temperature of the service environment is, the more expensive the thermocouple 50 is).
According to the combustion heat exchange assembly provided by the embodiment of the invention, the thermocouple 50 is arranged in the thermocouple mounting part 301, so that the temperature in the cavity is not influenced when the thermocouple 50 is sensitively monitored, the thermocouple 50 is prevented from being in a high-temperature environment for a long time, meanwhile, the thermocouple mounting part 301 can also support the thermocouple 50, the service life of the thermocouple 50 is prolonged, and the cost of the thermocouple 50 is reduced.
In some embodiments, the thermocouple installation section is a thermocouple well and the thermocouple 50 is adapted to be located within the thermocouple well.
A second burner installation space 11 is formed in the casing 1, and a second burner 20 is at least partially disposed in the second burner installation space 11. Thus, the hot gas of the second combustor 20 can enter into the flue gas channel 7 more, thereby transferring more heat to the heat exchanging part 2.
Referring to fig. 1 and 6, the second burner installation space 11 is located above the first burner installation space 12, the first burner 30 is a preheating burner, and the second burner 20 is a catalytic burner. The heat generated by the first burner 30 radiates the second burner 20 to primarily heat the second burner 20, so that the second burner 20 reaches a proper working temperature and is subjected to catalytic combustion, thus, when the air-gas mixture is combusted in the second burner 20, the combustion is sufficient, and the amount of harmful gases such as CO, NOx and the like generated due to insufficient combustion is greatly reduced.
Specifically, the catalyst disposed on the surface of the second combustor 20 can enable organic matters to undergo flameless combustion at a lower ignition temperature, reduce harmful gases generated during ignition of the fuel, and release a large amount of heat, reactant molecules in the fuel can be enriched on the surface of the catalyst, reaction rate is increased, and utilization rate of the fuel is increased. Because of flameless combustion, the combustion reaction is soft and stable, and the combustion noise generated when the water heater with open flame works is reduced, thereby the noise generated when the combustion heat exchange assembly works is smaller.
Referring to fig. 1, the first and second burner installation spaces 12 and 11 are defined by the heat exchanging part 2, thereby ensuring that the heat exchanging part 2 can directly contact the first and second burners 30 and 20 to directly exchange heat with the first and second burners 30 and 20.
Since the temperature is higher as the distance from the second burner 20 is closer, it is possible to prevent the thermocouple 50 from being in a high temperature environment for a long time and to improve the lifespan of the thermocouple 50 by mounting the thermocouple 50 in the thermocouple mounting part 301 on the first burner 30.
Referring to fig. 3 to 4, a thermocouple mounting hole is formed in the housing 1, and the thermocouple 50 is inserted into the thermocouple mounting portion 301 after passing through the thermocouple mounting hole.
The first burner 30 is preferably made of a ceramic material and has a rectangular parallelepiped shape having a plurality of vent holes 302, and each vent hole 302 is a through hole communicating vertically. The first burner 30 has a thermocouple installation part 301 thereon, and the thermocouple installation part 301 may be disposed inside or on an upper surface of the first burner 30.
For example, in some alternative embodiments, the thermocouple installation part 301 is located inside the first burner 30, and the inlet end of the thermocouple installation part 301 is located at a side of the first burner 30 and faces the thermocouple installation hole. As shown in fig. 2, the thermocouple mounting portion 301b is located inside the first burner 30 with the inlet end facing forward, facing the thermocouple mounting hole in the front side of the case 1.
As yet another alternative, the thermocouple mounting part 301 is located on the upper surface of the first burner 30, and the inlet end of the thermocouple mounting part 301 is located at the side of the first burner 30 and faces the thermocouple mounting hole. As shown in fig. 2, the thermocouple mounting portion 301a is located on the upper surface of the first burner 30, and the inlet end of the thermocouple mounting portion 301a is disposed forward to be opposite to the thermocouple mounting hole at the front side of the case 1. The thermocouple mounting portion 301c is located on the upper surface of the first burner 30, and the inlet end of the thermocouple mounting portion 301c is disposed facing right to be opposite to the thermocouple mounting hole on the right side of the case 1.
The thermocouple 50 is disposed in the corresponding thermocouple mounting portion 301 after passing through the thermocouple mounting hole, and is prevented from being completely exposed in the high temperature region of the cavity (between the first burner 30 and the second burner 20).
For the thermocouple installation part 301 (e.g., the thermocouple installation part 301a and the thermocouple installation part 301c) opened upward, the thermocouple 50 and the housing 1 may be fixed first, and then the housing 1 and the thermocouple 50 may be placed over the first burner 30 from top to bottom, so that the thermocouple 50 enters the thermocouple installation part 301 from top to bottom. For the thermocouple mounting part 301 (e.g., thermocouple mounting part 301b) having the upper side closed with only the inlet end open, the case 1 may be first placed over the first burner 30 from the top down, and the thermocouple 50 may be inserted into the thermocouple mounting part 301 from the side.
It is preferable to provide the thermocouple mounting part 301 at a side of the upper surface of the first burner 30 (e.g., the inlet end of the thermocouple mounting part 301 is directed to the right side), which is advantageous in that the thermocouple 50 is also mounted at a side of the heat exchanger 10, avoiding being restricted or interfered by the heat exchanging part 2 when mounted at the front surface. In addition, the thermocouple installation part 301 is provided on the upper surface of the first burner 30, and the thermocouple 50 is seated on the thermocouple installation part 301 just from the top down when assembled with the heat exchanger 10 in which the thermocouple 50 is installed.
Referring to fig. 6, the combustion heat exchange device according to another aspect of the present invention includes a premixing chamber 40 and the combustion heat exchange assembly of the above embodiment, the premixing chamber 40 is disposed below the first combustor 30, and the premixing chamber 40 has a gas flow passage communicating with the heat exchanger 10.
The lower part of the premixing cavity 40 is provided with a fan assembly 81, the fan assembly 81 is provided with a fan and a fan shell, the fan shell is provided with an air inlet 84 and a fuel gas inlet 85, under the power driving action of the fan, air enters the fan shell through the air inlet 84, fuel gas enters the fan shell through the fuel gas inlet 85, the fan further drives the air and the fuel gas to enter the premixing cavity 40, and the air and the fuel gas are uniformly mixed in the premixing cavity 40 and then enter the first combustor 30, so that the combustion effect is favorably improved and the combustion is sufficiently realized.
The gas inlet pipe is provided with a gas proportional valve 82, and the gas inlet amount can be changed by controlling the opening degree of the gas proportional valve 82.
The blower unit 81 and the gas proportional valve 82 are electrically connected to the controller 83, so that the air intake ratio of air and gas can be changed by controlling the rotation speed of the blower and the opening of the gas proportional valve 82.
A smoke collecting hood 70 is further disposed above the heat exchanger 10, and the smoke collecting hood 70 can collect the exhaust gas so that the combustion exhaust gas is guided out to a designated area through the smoke collecting hood 70.
The heat exchanging portion 2 includes: and a stopper heat exchanging part 21, wherein the stopper heat exchanging part 21 is disposed at the top of the first burner installation space 12, and the top of the first burner 30 is stopped and limited by the stopper heat exchanging part 21.
The heat exchanging portion 2 further includes: the heat exchanging part 24 is installed, the heat exchanging part 24 is installed in the second burner installation space 11, and the second burner 20 is limited by the heat exchanging part 24.
That is, a part of the heat exchanging part 2 serves as an installation structure of the second burner 20, and a part of the heat exchanging part 2 serves as a stopping structure of the first burner 30, so that additional parts for installing and fixing the first burner 30 and the second burner 20 are reduced, materials are saved, and the installation is convenient. And because the installation heat exchanging portion 24 and the blocking heat exchanging portion 21 are both made of high temperature resistant materials, when the installation heat exchanging portion 24 and the blocking heat exchanging portion 21 are in a high temperature environment for a long time, high temperature deformation does not occur, so that the top position of the first combustor 30 is ensured to be unchanged, and meanwhile, the position of the second combustor 20 is fixed, so that the distance between the first combustor 30 and the second combustor 20 is not changed, which is beneficial to ensuring a better combustion effect.
In addition, the stop heat exchanging part 21 and the installation heat exchanging part 24 are supporting and limiting structures, and water flow in the pipe can take away heat generated by the first combustor 30 and the second combustor 20, so that the problem that the common installation support is deformed by high temperature and cannot install and fix the first combustor 30 and the second combustor 20 is solved.
Optionally, the second burner 20 is a flameless second burner, the flameless second burner has a catalytic combustion module, when the water heater is in operation, after a certain amount of air is mixed with the gas, catalytic combustion occurs on the catalytic combustion module, a large amount of heat is generated, the generated heat radiates the heat exchanging portion 2, and the water flow in the heat exchanging portion 2 absorbs the heat of the high-temperature flue gas to heat up to hot water. The airflow direction is shown as F, namely the airflow direction is from bottom to top along the flue gas channel 7, so that more heat generated by catalytic combustion can reach the heat exchanging part 2, and the utilization rate of the heat is improved.
In some embodiments of the present invention, the area of the passage opening surrounded by the heat-blocking portion 21 is smaller than the area of the top of the first burner 30, so that when the first burner 30 is installed from bottom to top, the first burner 30 does not approach the second burner 20 through the passage opening surrounded by the heat-blocking portion 21, thereby ensuring accurate relative positions of the first burner 30 and the second burner 20. That is, the first burner 30 does not reach above the stopper heat exchanging portion 21 beyond the passage opening surrounded by the stopper heat exchanging portion 21.
Referring to fig. 1, the blocking heat exchanging part 21 is an elliptical heat exchanging pipe with a long axis arranged obliquely, in the direction of the long axis of the blocking heat exchanging part 21, the upper end of the blocking heat exchanging part 21 extends toward the center of the casing 1, the upper end of the blocking heat exchanging part 21 is higher than the top surface of the first burner 30, the lower end of the blocking heat exchanging part 21 extends back to the center of the casing 1, and the lower end of the blocking heat exchanging part 21 is lower than the top surface of the first burner 30, so that the blocking range of the blocking heat exchanging part 21 is large, and the blocking range is suitable for blocking the first burners 30 with different lengths, for example, when the length of the first burner 30 is small, the top of the first burner 30 is close to the upper end of the blocking heat exchanging part 21; when the length of the first burner 30 is large, the top of the first burner 30 is close to the lower end of the stopper heat exchanging portion 21. The blocking heat exchanging part 21 having the long axis inclined may be used to block the first burners 30 having various length sizes.
Alternatively, the stopper heat exchanging portion 21 is plural, and the plural stopper heat exchanging portions 21 are symmetrically arranged with respect to the first burner 30, whereby the symmetrically arranged stopper heat exchanging portions 21 apply symmetrical stopper forces to the first burner 30, preventing the first burner 30 from tipping.
In some embodiments, not shown, the blocking heat exchanging part 21 is an elliptical heat exchanging pipe having a horizontally arranged major axis, and the blocking heat exchanging part 21 is higher than the top surface of the first burner 30. The horizontally arranged stop heat exchanging part 21 may also provide a good stop limit function for the first burner 30, preventing the first burner 30 from approaching the second burner 20.
Referring to fig. 1, the installation heat exchanging part 24 includes: a supporting heat exchanging part 22, the supporting heat exchanging part 22 being located at the bottom of the second burner installation space 11, the supporting heat exchanging part 22 supporting the second burner 20, and the second burner 20 being supported and installed in the second burner installation space 11.
In the embodiment shown in fig. 1, the supporting heat exchanging portion 22 is divided into a middle group supporting heat exchanging portion 221, a first side group supporting heat exchanging portion 222, and a second side group supporting heat exchanging portion 223, the middle group supporting heat exchanging portion 221 is supported at a middle region of the bottom surface of the second combustor 20, the first side group supporting heat exchanging portion 222 is supported at a boundary between the bottom surface and the first side surface of the second combustor 20, and the second side group supporting heat exchanging portion 223 is supported at a boundary between the bottom surface and the second side surface of the second combustor 20.
Directly below the first side group-supporting heat exchanging portion 222 and the second side group-supporting heat exchanging portion 223 are further provided lower heat exchanging pipes 224, the lower heat exchanging pipes 224 enclosing a downwardly open lower space with the first side group-supporting heat exchanging portion 222, the second side group-supporting heat exchanging portion 223 and the middle group-supporting heat exchanging portion 221, the lower space being adapted to be configured as a lower combustion space in which the first burner installation space 12 is formed.
In the embodiment shown in fig. 2, the supporting heat exchanging portion 22 is a middle group supporting heat exchanging portion 221, the middle group supporting heat exchanging portion 221 is supported at a middle region of the bottom surface of the second combustor 20, and both sides of the middle group supporting heat exchanging portion 221 are side heat exchanging portions separated from the second combustor 20. By adjusting the height of the middle group supporting heat exchanging part 221, the distance between the second burner 20 and the first burner 30 can be adjusted to meet the requirement of the optimal combustion distance.
In some embodiments of the present invention, installing the heat exchanging part 24 further comprises: and the limiting heat exchanging part 23, wherein the limiting heat exchanging part 23 is positioned at both sides and/or the top of the second combustor installation space 11, and the limiting heat exchanging part 23 is used for limiting the second combustor 20 in the second combustor installation space 11. Referring to fig. 1, the limit heat exchanging part 23 is located at both sides of the second burner installation space 11.
In the embodiment shown in fig. 1, the long axes of the heat exchanging portions 2 may be disposed vertically, except for the stopper heat exchanging portion 21. Of course, in some embodiments, not shown, the long axes of the other heat exchanging portions 2 may be horizontally arranged.
Referring to fig. 4-5, the combustion heat exchange device further comprises: the screen plate 60 is arranged between the first burner 30 and the premix chamber 40, and the screen plate 60 is arranged below the first burner 30 and is an air inlet surface of the first burner 30. Optionally, the first burner 30 is a sheet metal part.
The screen plate 60 has a plurality of criss-cross partition ribs 601, and the first burner 30 is divided into a plurality of intake regions 602 by the partition ribs 601. Specifically, the partition rib 601 includes a plurality of lateral partition ribs and a plurality of longitudinal partition ribs, which are arranged to intersect, thereby forming a plurality of rectangular intake regions 602. When the uniformly mixed gas in the premixing chamber 40 passes through the mesh plate 60, the partition rib 601 divides the mixed gas into a plurality of branches, each branch enters the first burner 30 from the corresponding gas inlet area 602 and enters the vent hole 302 on the first burner 30 corresponding to the gas inlet area 602, and therefore, when the total amount of the mixed gas is not changed, the gas flow channel is narrowed, so that the linear velocity of the gas flow can be increased, and the backfire phenomenon of the first burner 30 can be prevented.
In other words, the mesh plate 60 is used to divide all the ventilation holes 302 of the first burner 30 into a plurality of small intake areas 602 (see fig. 5), and the linear velocity of the gas passing through the first burner 30 can be increased to prevent backfire after the mesh plate 60 is added at the same gas flow rate, especially at a small gas flow rate under a small load.
Alternatively, the intake areas of the plurality of intake regions 602 are equal, thereby preventing the linear velocities of the portions of the first combustor 30 corresponding to the respective intake regions 602 from being different, resulting in poor combustion.
The net plate 60 can be designed into net structures with different sizes, specifications and shapes according to actual requirements.
Referring to fig. 1-6, when the combustion heat exchange device works, the gas and air are sucked into the blower by the blower unit 81 at the air inlet 84 and the gas inlet 85, and then enter the premixing chamber 40 after being stirred and mixed by the blower impeller in the blower volute. After the mixed gas comes out of the premixing cavity 40, the mixed gas is divided into a plurality of air inlet areas 602 by the partition ribs 601 of the mesh plate 60, the mixed gas is diffused into the vent holes 302 corresponding to the air inlet areas 602, the mixed gas is ignited by the ignition needles and then is combusted above the vent holes 302 of the first combustor 30 to release heat, the second combustor 20 is preheated, and with the continuous increase of the temperature of the second combustor 20 and the change of the air-fuel ratio, after the temperature of the second combustor 20 reaches the temperature capable of maintaining combustion, the open flame on the first combustor 30 below disappears, the air-fuel mixed gas realizes flameless combustion on the second combustor 20, a large amount of heat is released, and water in the heat exchanging part 2 is heated into hot water to flow out. In the combustion process, if the air and gas mixture ratio is not good, the heat released by combustion is different, the temperature in the cavity is also different, the thermocouple 50 is positioned in the thermocouple installation part 301 and monitors the temperature of the cavity in real time, and feeds the temperature back to the controller 83, and the controller 83 adjusts the fan and the gas proportional valve 82 again, so that good and stable combustion is realized.
Alternatively, the combustion heat exchange device may be a gas water heater or a gas wall-hanging stove.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (15)
1. A combustion heat exchange assembly, comprising:
the heat exchanger is provided with a shell, a heat exchange part is arranged in the shell, a heat exchange medium channel is arranged in the heat exchange part, and a first combustor mounting space is formed in the shell;
a thermocouple;
the first combustor is at least partially arranged in the first combustor mounting space, a thermocouple mounting part is arranged on the first combustor, and the thermocouple is suitable for being located in the thermocouple mounting part.
2. The combustion heat exchange assembly of claim 1 wherein the thermocouple mounting portion is a thermocouple recess, the thermocouple being adapted to be located within the thermocouple recess.
3. The combustion heat exchange assembly of claim 1 wherein a second combustor mounting space is formed within the housing, the second combustor mounting space being located above the first combustor mounting space, a second combustor being at least partially disposed within the second combustor mounting space.
4. The combustion heat exchange assembly of claim 3, wherein the first burner installation space and the second burner installation space are both defined by the heat exchange portion.
5. The combustion heat exchange assembly of claim 4, wherein the heat exchange portion comprises a stopper heat exchange portion, the stopper heat exchange portion is disposed at the top of the first combustor installation space, and the top of the first combustor is stopped and limited by the stopper heat exchange portion.
6. The combustion heat exchange assembly of claim 4, wherein the heat exchange portion comprises: and the installation heat exchange part is arranged in the installation space of the second combustor, and the second combustor is limited by the installation heat exchange part.
7. The combustion heat exchange assembly of claim 6, wherein the mounting heat exchange portion comprises:
the supporting heat exchange part is positioned at the bottom of the second combustor mounting space and is used for supporting and arranging the second combustor in the second combustor mounting space;
and the limiting heat exchange part is positioned on two sides and/or the top of the second combustor mounting space and is used for limiting the second combustor in the second combustor mounting space.
8. The combustion heat exchange assembly of any one of claims 1 to 7, wherein the housing is provided with a thermocouple mounting hole, and the thermocouple is inserted into the thermocouple mounting portion after penetrating through the thermocouple mounting hole.
9. The combustion heat exchange assembly of claim 8, wherein the thermocouple mounting portion is located inside the first burner, and the inlet end of the thermocouple mounting portion is located at a side of the first burner and faces the thermocouple mounting hole.
10. The combustion heat exchange assembly of claim 8, wherein the thermocouple mounting portion is located on an upper surface of the first burner, and an inlet end of the thermocouple mounting portion is located on a side of the first burner and directly opposite the thermocouple mounting hole.
11. A combustion heat exchange device, comprising:
the combustion heat exchange assembly of any one of claims 1-10;
the premixing cavity is arranged below the first combustor and is provided with a gas flow passage communicated with the heat exchanger.
12. The combustion heat exchange device of claim 11, wherein the premix chamber has a first burner positioning portion at which the first burner is positioned.
13. The combustion heat exchange device of claim 11, further comprising: the screen plate is arranged between the first combustor and the premixing cavity and provided with a plurality of criss-cross separating ribs, and the first combustor is divided into a plurality of air inlet areas by the separating ribs.
14. The combustion heat exchange device of claim 13, wherein the partition ribs comprise: the air inlet structure comprises a plurality of transverse separating ribs and a plurality of longitudinal separating ribs, wherein the transverse separating ribs and the longitudinal separating ribs are arranged in a crossed mode to form a plurality of rectangular air inlet areas.
15. The combustion heat exchange device of claim 13 or 14, wherein the air intake areas of the plurality of air intake regions are equal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010065832.7A CN113137752A (en) | 2020-01-20 | 2020-01-20 | Combustion heat exchange assembly and combustion heat exchange equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010065832.7A CN113137752A (en) | 2020-01-20 | 2020-01-20 | Combustion heat exchange assembly and combustion heat exchange equipment |
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| CN113137752A true CN113137752A (en) | 2021-07-20 |
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| CN202010065832.7A Pending CN113137752A (en) | 2020-01-20 | 2020-01-20 | Combustion heat exchange assembly and combustion heat exchange equipment |
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| CN212006254U (en) * | 2020-01-20 | 2020-11-24 | 芜湖美的厨卫电器制造有限公司 | Combustion heat exchange assembly and combustion heat exchange equipment |
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| JPH05164308A (en) * | 1991-12-17 | 1993-06-29 | Matsushita Electric Ind Co Ltd | Catalytic combustion device |
| EP0962697A2 (en) * | 1998-06-05 | 1999-12-08 | Matsushita Electric Industrial Co., Ltd. | Catalytic combustion system and combustion control method |
| CN105841340A (en) * | 2016-05-13 | 2016-08-10 | 芜湖美的厨卫电器制造有限公司 | Gas water heater |
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