Combustion heat exchange components and combustion heat exchange equipment

Abstract

The present invention discloses a combustion heat exchange component and a combustion heat exchange device. The combustion heat exchange component includes: a heat exchanger, the heat exchanger has 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 burner installation space is formed in the shell; a thermocouple; a first burner, the first burner is at least partially arranged in the first burner installation space, and a thermocouple installation part is arranged on the first burner, and the thermocouple is suitable for being located in the thermocouple installation part. According to the combustion heat exchange component of the present invention, the thermocouple is placed in the thermocouple installation part, which does not affect the thermocouple's sensitive monitoring of the temperature in the cavity, and can avoid the thermocouple being in a high temperature environment for a long time. At the same time, the thermocouple installation part can also support the thermocouple, which is beneficial to improve the service life of the thermocouple and reduce the cost of the thermocouple.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and in particular to a combustion heat exchange component and a combustion heat exchange device. Background Art

[0002] At present, some water heaters use a combination of a first burner and a second burner to heat water flowing through a heat exchanger. However, the mounting support structures of the first burner and the second burner are easily deformed due to being in a high temperature environment for a long time, resulting in unreliable installation of the first burner and the second burner.

[0003] In addition, in order to achieve a good combustion effect, a certain distance must be maintained between the first burner and the second burner. During the use of existing water heaters, due to the high-temperature deformation of the installation support structure, it is difficult to maintain a constant distance between the first burner and the second burner, affecting the combustion effect.

[0004] At the same time, when a large amount of mixed gas of air and gas passes through the first burner or the linear velocity of the mixed gas passing through the first burner is low, flashback will occur in the first burner. The thermocouple is located in the cavity above the first burner, which leads to high requirements for the high temperature resistance of the thermocouple and increases the cost of the thermocouple. Summary of the invention

[0005] The present invention aims to solve at least one of the above technical problems in the prior art to a certain extent. To this end, the present invention provides a combustion heat exchange component that can reduce the high temperature resistance requirements for thermocouples and save thermocouple costs.

[0006] The present invention also provides a combustion heat exchange device having the above combustion heat exchange component.

[0007] According to an embodiment of the present invention, a combustion heat exchange component includes: a heat exchanger, the heat exchanger having a shell, a heat exchange part is arranged in the shell, the heat exchange part has a heat exchange medium channel, and a first burner installation space is formed in the shell; a thermocouple; a first burner, the first burner is at least partially configured in the first burner installation space, and a thermocouple installation part is arranged on the first burner, and the thermocouple is suitable for being located in the thermocouple installation part.

[0008] According to the combustion heat exchange component of the embodiment of the present invention, the thermocouple is placed in the thermocouple mounting portion, which neither affects the thermocouple's sensitive monitoring of the temperature in the cavity nor prevents the thermocouple from being in a high temperature environment for a long time. At the same time, the thermocouple mounting portion can also support the thermocouple, which is beneficial to increase the service life of the thermocouple and reduce the cost of the thermocouple.

[0009] According to some embodiments of the present invention, the thermocouple mounting portion is a thermocouple groove, and the thermocouple is suitable for being located in the thermocouple groove.

[0010] According to some embodiments of the present invention, a second burner installation space is formed in the shell, the second burner installation space is located above the first burner installation space, and the second burner is at least partially arranged in the second burner installation space.

[0011] According to some embodiments of the present invention, the first burner installation space and the second burner installation space are both defined by the heat exchange portion.

[0012] According to some embodiments of the present invention, the heat exchange portion includes a stop heat exchange portion, the stop heat exchange portion is arranged at the top of the first burner installation space, and the top of the first burner is stopped and limited by the stop heat exchange portion.

[0013] According to some embodiments of the present invention, the heat exchange portion includes: an installation heat exchange portion, the installation heat exchange portion is arranged in the second burner installation space, and the second burner is limited by the installation heat exchange portion.

[0014] Specifically, the installation heat exchange part includes: a supporting heat exchange part, which is located at the bottom of the second burner installation space, and is used to support the second burner and set it in the second burner installation space; a limiting heat exchange part, which is located on both sides and / or the top of the second burner installation space, and is used to limit the second burner and set it in the second burner installation space.

[0015] According to some embodiments of the present invention, a thermocouple mounting hole is provided on the shell, and the thermocouple is inserted into the thermocouple mounting portion after passing through the thermocouple mounting hole.

[0016] Optionally, the thermocouple mounting portion is located inside the first burner, and an inlet end of the thermocouple mounting portion is located on a side of the first burner and directly faces the thermocouple mounting hole.

[0017] Optionally, the thermocouple mounting portion is located on the 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 facing the thermocouple mounting hole.

[0018] According to another embodiment of the present invention, a combustion heat exchange device includes a premixing chamber and the above-mentioned combustion heat exchange assembly, wherein the premixing chamber is arranged below the first burner and has a gas flow channel connected to the heat exchanger.

[0019] According to some embodiments of the present invention, the premixing chamber has a first burner positioning portion, and the first burner is positioned at the first burner positioning portion.

[0020] According to some embodiments of the present invention, the combustion heat exchange equipment further comprises: a mesh plate, which is arranged between the first burner and the premixing chamber and has a plurality of criss-crossing dividing ribs, and the first burner is divided into a plurality of air intake areas by the dividing ribs.

[0021] The partition ribs include: a plurality of transverse partition ribs and a plurality of longitudinal partition ribs, and the plurality of transverse partition ribs and the plurality of longitudinal partition ribs are cross-arranged to form a plurality of rectangular air intake areas.

[0022] Optionally, the air intake areas of the plurality of air intake regions are equal.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a cross-sectional view of a heat exchanger, a first burner, a second burner, and a premixing chamber;

[0025] Figure 2 is a three-dimensional schematic diagram of a first burner;

[0026] Figure 3 It is a schematic diagram of the assembly of the heat exchanger, the first burner, the thermocouple, and the premixing chamber;

[0027] Figure 4 is an exploded schematic diagram of the first burner, the screen plate, and the premixing chamber;

[0028] Figure 5 is a top view of the first burner and the screen plate;

[0029] Figure 6 It is a schematic diagram of a combustion heat exchange device.

[0030] Reference numerals:

[0031] Heat exchanger 10, shell 1, second burner installation space 11, first burner installation space 12, heat exchange part 2, stop heat exchange part 21, installation heat exchange part 24, support heat exchange part 22, middle group support heat exchange part 221, first side group support heat exchange part 222, second side group support heat exchange part 223, lower heat exchange tube 224, limit heat exchange part 23, flue gas flow duct 7, second burner 20, first burner 30, thermocouple installation part 301, air vent 302, premixing chamber 40, thermocouple 50, mesh plate 60, dividing rib 601, air intake area 602, smoke hood 70, fan assembly 81, gas proportional valve 82, controller 83, air inlet 84, gas inlet 85. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Combine the following Figure 1-Figure 6 A combustion heat exchange assembly according to an embodiment of the present invention is described in detail.

[0036] Reference Figure 1-Figure 3As shown, the combustion heat exchange assembly according to the embodiment of the present invention includes: a heat exchanger 10, a thermocouple 50, a second burner 20 and a first burner 30. The heat exchanger 10 has a shell 1, a heat exchange part 2 is arranged in the shell 1, and a heat exchange medium channel is provided in the heat exchange part 2. Water is suitable for flowing in the heat exchange medium channel. In other words, the heat exchange part 2 is a tubular structure, and a water channel connected to the water inlet pipe and the water outlet pipe is formed in the tubular structure. After the cold water in the water inlet pipe is heated in the heat exchange part 2, it flows out from the water outlet pipe.

[0037] A flue gas flow duct 7 is formed in the shell 1, and a first burner installation space 12 is formed in the flue gas flow duct 7. The first burner 30 is at least partially arranged in the first burner installation space 12. In this way, the high-temperature hot air of the first burner 30 can enter the flue gas flow duct 7 more, thereby improving the utilization rate of heat.

[0038] The first burner 30 is provided with a thermocouple mounting portion 301, and the thermocouple 50 is suitable for being located in the thermocouple mounting portion 301. The thermocouple 50 is used to detect the cavity temperature in the housing 1. 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, resulting in uneven force on the thermocouple 50, which affects the service life of the thermocouple 50. After the thermocouple 50 is placed in the thermocouple mounting portion 301, the thermocouple mounting portion 301 can support the thermocouple 50, thereby reducing the probability of damage to the thermocouple 50.

[0039] The thermocouple 50 placed at the thermocouple mounting portion 301 can sensitively monitor the temperature in the cavity to ensure the monitoring effect, and can avoid being in the high temperature environment of the cavity above the first burner 30 for a long time, thereby helping to increase the service life of the thermocouple 50 and reduce the cost of the thermocouple 50 (the higher the ambient temperature, the more expensive the required thermocouple 50).

[0040] According to the combustion heat exchange component of the embodiment of the present invention, the thermocouple 50 is placed in the thermocouple mounting portion 301, which does not affect the thermocouple 50's sensitive monitoring of the temperature in the cavity, and can also prevent the thermocouple 50 from being in a high temperature environment for a long time. At the same time, the thermocouple mounting portion 301 can also support the thermocouple 50, which is beneficial to increase the service life of the thermocouple 50 and reduce the cost of the thermocouple 50.

[0041] In some embodiments, the thermocouple mounting portion is a thermocouple groove, and the thermocouple 50 is suitable for being located in the thermocouple groove.

[0042] A second burner installation space 11 is formed in the housing 1, and the second burner 20 is at least partially disposed in the second burner installation space 11. In this way, more high-temperature hot air from the second burner 20 can enter the flue gas flow channel 7, thereby transferring more heat to the heat exchange part 2.

[0043] Reference Figure 1 , Figure 6 As shown, 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 to the second burner 20, preliminarily heats the second burner 20, and makes the second burner 20 reach a suitable working temperature, and catalytic combustion occurs. In this way, when the air-gas mixture burns in the second burner 20, it burns fully, greatly reducing the amount of harmful gases such as CO and NOx generated due to incomplete combustion.

[0044] Specifically, the catalyst provided on the surface of the second burner 20 can make organic matter burn flamelessly at a lower ignition temperature, reduce the harmful gases generated by the fuel during ignition, and release a large amount of heat. The reactant molecules in the fuel can be enriched on the surface of the catalyst, increasing the reaction rate and the utilization rate of the fuel. The catalyst can effectively inhibit the generation of nitrogen oxides (NOx). At the same time, the catalyst can make the catalytic combustion of the fuel more complete, reduce the content of CO in the flue gas, and thus effectively reduce the emission of harmful gases. Due to the flameless combustion, the combustion reaction is gentle and stable, reducing the combustion noise generated by the open flame water heater during operation, thereby making the combustion heat exchange component less noisy during operation.

[0045] Reference Figure 1 As shown, the first burner installation space 12 and the second burner installation space 11 are both defined by the heat exchange part 2, thereby ensuring that the heat exchange part 2 can directly contact the first burner 30 and the second burner 20, thereby directly exchanging heat with the first burner 30 and the second burner 20.

[0046] Since the temperature is higher when the distance to the second burner 20 is closer, by installing the thermocouple 50 in the thermocouple installation portion 301 on the first burner 30 , the thermocouple 50 can be prevented from being in a high temperature environment for a long time, thereby increasing the service life of the thermocouple 50 .

[0047] Reference Figure 3-Figure 4 As shown, a thermocouple mounting hole is provided on the housing 1 , and the thermocouple 50 is inserted into the thermocouple mounting portion 301 after passing through the thermocouple mounting hole.

[0048] The first burner 30 is preferably made of ceramic material and has a rectangular shape with a plurality of vents 302 , each of which is a through hole connected vertically. The first burner 30 has a thermocouple mounting portion 301 , which can be disposed inside or on the upper surface of the first burner 30 .

[0049] For example, in some optional embodiments, the thermocouple mounting portion 301 is located inside the first burner 30, and the inlet end of the thermocouple mounting portion 301 is located on the side of the first burner 30 and directly facing the thermocouple mounting hole. Figure 2 As shown, the thermocouple mounting portion 301 b is located inside the first burner 30 , and the inlet end is arranged forward, facing the thermocouple mounting hole on the front side of the shell 1 .

[0050] In some other optional embodiments, the thermocouple mounting portion 301 is located on the upper surface of the first burner 30, and the inlet end of the thermocouple mounting portion 301 is located on the side of the first burner 30 and directly facing the thermocouple mounting hole. Figure 2 As shown, 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 arranged forward, and is directly opposite to the thermocouple mounting hole on the front side of the housing 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 arranged rightward, and is directly opposite to the thermocouple mounting hole on the right side of the housing 1.

[0051] After the thermocouple 50 passes through the thermocouple mounting hole, it falls into the corresponding thermocouple mounting portion 301 to avoid being completely exposed in the high temperature area of ​​the cavity (between the first burner 30 and the second burner 20).

[0052] For the thermocouple mounting part 301 that is open at the top (such as the thermocouple mounting part 301a and the thermocouple mounting part 301c), the thermocouple 50 can be fixed to the housing 1 first, and then the housing 1 and the thermocouple 50 are placed from top to bottom above the first burner 30, so that the thermocouple 50 enters the thermocouple mounting part 301 from top to bottom. For the thermocouple mounting part 301 that is closed at the top and only the inlet end is open (such as the thermocouple mounting part 301b), the housing 1 can be placed from top to bottom above the first burner 30, and then the thermocouple 50 can be inserted into the thermocouple mounting part 301 from the side.

[0053] Preferably, the thermocouple mounting portion 301 is arranged on the side of the upper surface of the first burner 30 (for example, the inlet end of the thermocouple mounting portion 301 faces the right side), which has the advantage that the thermocouple 50 is also installed on the side of the heat exchanger 10, avoiding the restriction or interference of the heat exchange portion 2 when installed on the front. In addition, the thermocouple mounting portion 301 is arranged on the upper surface of the first burner 30, and when assembled with the heat exchanger 10 equipped with the thermocouple 50, the thermocouple 50 just falls from top to bottom at the position of the thermocouple mounting portion 301.

[0054] Reference Figure 6As shown, the combustion heat exchange device according to another embodiment of the present invention includes a premixing chamber 40 and the combustion heat exchange assembly of the above embodiment, the premixing chamber 40 is arranged below the first burner 30, and the premixing chamber 40 has a gas flow channel connected to the heat exchanger 10.

[0055] A fan assembly 81 is provided below the premixing chamber 40. The fan assembly 81 comprises a fan and a fan housing. An air inlet 84 and a gas inlet 85 are provided on the fan housing. Under the power driving action of the fan, air enters the fan housing through the air inlet 84, and gas enters the fan housing through the gas inlet 85. The fan further drives the air and gas into the premixing chamber 40. After the air and gas are evenly mixed in the premixing chamber 40, they enter the first burner 30, which is beneficial to improving the combustion effect and ensuring full combustion.

[0056] A gas proportional valve 82 is provided on the gas inlet pipe. By controlling the opening of the gas proportional valve 82, the gas inlet amount can be changed.

[0057] The fan assembly 81 and the gas proportional valve 82 are both electrically connected to the controller 83 so as to change the intake ratio of air and gas by controlling the rotation speed of the fan and the opening of the gas proportional valve 82 .

[0058] A smoke collecting hood 70 is further provided above the heat exchanger 10 , and the smoke collecting hood 70 can gather the exhaust gas so that the combustion exhaust gas can be guided to a designated area through the smoke collecting hood 70 .

[0059] The premixing chamber 40 has a first burner positioning portion, and the first burner 30 is positioned at the first burner positioning portion. In other words, the upper end of the first burner 30 is stopped by the stop heat exchange portion 21 in the heat exchanger 10, and the lower end is positioned in the first burner positioning portion of the premixing chamber 40. In this way, when the heat exchanger 10 is connected to the premixing chamber 40, no additional installation and fixing parts are required, and the first burner 30 can be installed and fixed in the combustion heat exchange equipment, which is conducive to saving the number of parts and reducing the overall weight and cost of the combustion heat exchange equipment.

[0060] The heat exchange part 2 includes: a stop heat exchange part 21 , which is arranged at the top of the first burner installation space 12 , and the top of the first burner 30 is stopped and limited by the stop heat exchange part 21 .

[0061] The heat exchange part 2 further includes: an installation heat exchange part 24 , which is disposed in the second burner installation space 11 , and the second burner 20 is limited by the installation heat exchange part 24 .

[0062] That is to say, a part of the heat exchange part 2 serves as the mounting structure of the second burner 20, and a part of the heat exchange part 2 serves as the stop structure of the first burner 30, which reduces the number of additional parts for mounting and fixing the first burner 30 and the second burner 20, saves materials, and facilitates installation. In addition, since the mounting heat exchange part 24 and the stop heat exchange part 21 are both made of high-temperature resistant materials, the mounting heat exchange part 24 and the stop heat exchange part 21 will not be deformed by high temperature when they are in a high-temperature environment for a long time, thereby ensuring that the top position of the first burner 30 remains unchanged, and at the same time, the position of the second burner 20 is fixed, thereby, the distance between the first burner 30 and the second burner 20 will not change, which is conducive to ensuring a better combustion effect.

[0063] In addition, the stopping heat exchange part 21 and the installing heat exchange part 24 are both supporting and limiting structures, and the water flow in the pipe can take away the heat generated by the first burner 30 and the second burner 20, thereby solving the problem that the ordinary installation bracket is deformed by high temperature and cannot install and fix the first burner 30 and the second burner 20.

[0064] Optionally, the second burner 20 is a flameless second burner, which has a catalytic combustion module. When the water heater is working, the gas is mixed with a certain amount of air and catalytic combustion occurs on the catalytic combustion module, generating a large amount of heat. The generated heat is radiated to the heat exchange part 2, and the water flow in the heat exchange part 2 absorbs the heat of the high-temperature flue gas and heats up to hot water. The airflow direction is shown in F, that is, from bottom to top along the flue gas flow channel 7, ensuring that more heat generated by the catalytic combustion reaches the heat exchange part 2, thereby improving the utilization rate of the heat.

[0065] In some embodiments of the present invention, the area of ​​the through opening enclosed by the stopper heat exchange portion 21 is smaller than the top area of ​​the first burner 30. Therefore, when the first burner 30 is installed from bottom to top, the first burner 30 will not approach the second burner 20 through the through opening enclosed by the stopper heat exchange portion 21, thereby ensuring the accuracy of the relative position between the first burner 30 and the second burner 20. In other words, the first burner 30 will not pass through the through opening enclosed by the stopper heat exchange portion 21 and reach the top of the stopper heat exchange portion 21.

[0066] Reference Figure 1As shown, the stop heat exchange portion 21 is an elliptical heat exchange tube with a tilted long axis. In the long axis direction of the stop heat exchange portion 21, the upper end of the stop heat exchange portion 21 extends toward the center of the shell 1, and the upper end of the stop heat exchange portion 21 is higher than the top surface of the first burner 30, and the lower end of the stop heat exchange portion 21 extends away from the center of the shell 1, and the lower end of the stop heat exchange portion 21 is lower than the top surface of the first burner 30. In this way, the stop range of the stop heat exchange portion 21 is large, so it is suitable for stopping first burners 30 of 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 stop heat exchange portion 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 stop heat exchange portion 21. The stop heat exchange portion 21 with a tilted long axis can be used to stop first burners 30 of various lengths.

[0067] Optionally, there are multiple stop heat exchange parts 21, and the multiple stop heat exchange parts 21 are symmetrically arranged about the first burner 30, so that the symmetrically arranged stop heat exchange parts 21 apply symmetrical stopping forces to the first burner 30 to prevent the first burner 30 from tipping over.

[0068] In some embodiments not shown, the stop heat exchange portion 21 is an elliptical heat exchange tube with a long axis arranged horizontally, and the stop heat exchange portion 21 is higher than the top surface of the first burner 30. The horizontally arranged stop heat exchange portion 21 can also provide a good stop limit function for the first burner 30 to prevent the first burner 30 from approaching the second burner 20.

[0069] Reference Figure 1 As shown, the installation heat exchange part 24 includes: a supporting heat exchange part 22, which is located at the bottom of the second burner installation space 11, and is used to support the second burner 20, and support the second burner 20 to be set in the second burner installation space 11.

[0070] exist Figure 1 In the illustrated embodiment, the supporting heat exchange portion 22 is divided into an intermediate group supporting heat exchange portion 221, a first side group supporting heat exchange portion 222 and a second side group supporting heat exchange portion 223. The intermediate group supporting heat exchange portion 221 is supported in the middle area of ​​the bottom surface of the second burner 20, the first side group supporting heat exchange portion 222 is supported at the junction of the bottom surface of the second burner 20 and the first side surface, and the second side group supporting heat exchange portion 223 is supported at the junction of the bottom surface of the second burner 20 and the second side surface.

[0071] A lower heat exchange tube 224 is also provided directly below the first side group supporting heat exchange part 222 and the second side group supporting heat exchange part 223. The lower heat exchange tube 224, the first side group supporting heat exchange part 222, the second side group supporting heat exchange part 223 and the middle group supporting heat exchange part 221 together form a lower space opening downward. The lower space is suitable for being constructed as a lower combustion space, and the first burner installation space 12 is formed in the lower combustion space.

[0072] exist Figure 2 In the illustrated embodiment, the supporting heat exchange portion 22 is a middle group supporting heat exchange portion 221, which is supported in the middle area of ​​the bottom surface of the second burner 20, and the two sides of the middle group supporting heat exchange portion 221 are side heat exchange portions, which are separated from the second burner 20. By adjusting the height of the middle group supporting heat exchange portion 221, the distance between the second burner 20 and the first burner 30 can be adjusted to meet the optimal combustion distance requirements.

[0073] In some embodiments of the present invention, the installation heat exchange part 24 further includes: a limiting heat exchange part 23, the limiting heat exchange part 23 is located on both sides and / or the top of the second burner installation space 11, and the limiting heat exchange part 23 is used to limit the second burner 20 in the second burner installation space 11. Figure 1 As shown, the limiting heat exchange part 23 is located on both sides of the second burner installation space 11.

[0074] exist Figure 1 In the illustrated embodiment, except for the stopper heat exchange portion 21, the long axes of the other heat exchange portions 2 can be arranged vertically. Of course, in some embodiments not shown, the long axes of the other heat exchange portions 2 can be arranged horizontally.

[0075] Reference Figure 4-Figure 5 As shown, the combustion heat exchange device further includes: a mesh plate 60, which is disposed between the first burner 30 and the premixing chamber 40, and is placed below the first burner 30, serving as an air intake surface of the first burner 30. Optionally, the first burner 30 is a sheet metal part.

[0076] The mesh plate 60 has a plurality of crisscross dividing ribs 601, and the first burner 30 is divided into a plurality of air intake areas 602 by the dividing ribs 601. Specifically, the dividing ribs 601 include a plurality of transverse dividing ribs and a plurality of longitudinal dividing ribs, and the transverse dividing ribs and the longitudinal dividing ribs are arranged crosswise to form a plurality of rectangular air intake areas 602. When the mixed gas evenly mixed in the premixing chamber 40 passes through the mesh plate 60, the dividing ribs 601 will divide the mixed gas into a plurality of streams, and each stream enters the first burner 30 from the corresponding air intake area 602, and enters the air vents 302 on the first burner 30 corresponding to the air intake area 602, thereby, when the total amount of the mixed gas remains unchanged, the airflow channel is narrowed, thereby increasing the linear velocity of the airflow and preventing the first burner 30 from backfire.

[0077] In other words, the function of the mesh plate 60 is to divide all the vent holes 302 of the first burner 30 into a plurality of small air intake areas 602 (see Figure 5 ), under the same gas flow rate, especially when the gas flow rate under small load is small, adding the mesh plate 60 can increase the linear velocity of the gas passing through the first burner 30 to prevent backfire.

[0078] Optionally, the air intake areas of the plurality of air intake regions 602 are equal, thereby preventing poor combustion effects caused by different partial linear velocities of the first burner 30 corresponding to each air intake region 602 .

[0079] The mesh plate 60 can be designed into mesh structures of different sizes, specifications and shapes according to actual needs.

[0080] Reference Figure 1-Figure 6 As shown, when the combustion heat exchange equipment is working, the gas and air are sucked into the fan by the fan assembly 81 at the air inlet 84 and the gas inlet 85, and enter the premixing chamber 40 after being stirred and mixed by the fan impeller in the fan volute. After coming out of the premixing chamber 40, the gas is divided into a plurality of air intake areas 602 by the dividing ribs 601 of the mesh plate 60, and the mixed gas diffuses into the air holes 302 corresponding to each air intake area 602. After being ignited by the ignition needle, the mixed gas burns above the air holes 302 of the first burner 30 to release heat, and preheats the second burner 20. With the continuous increase in the temperature of the second burner 20 and the change in the air-gas ratio, when the temperature of the second burner 20 reaches a temperature that can maintain combustion, the open flame on the first burner 30 below disappears, and the air-fuel mixed gas realizes flameless combustion on the second burner 20, releasing a large amount of heat, and heating the water in the heat exchange part 2 to flow out as hot water. During the combustion process, if the air-gas ratio is not good, the heat released by the combustion is different and the temperature in the cavity is also different. The thermocouple 50 is located in the thermocouple mounting portion 301 and monitors the cavity temperature in real time and feeds back to the controller 83. The controller 83 then adjusts the fan and the gas proportional valve 82 to achieve good and stable combustion.

[0081] Optionally, the combustion heat exchange equipment may be a gas water heater or a gas wall-mounted boiler.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0083] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A combustion heat exchange component, characterized in that: include: A heat exchanger, wherein the heat exchanger has a shell, a heat exchange portion is disposed in the shell, a heat exchange medium channel is disposed in the heat exchange portion, a flue gas flow passage is formed in the shell, and a first burner installation space is formed in the flue gas flow passage; Thermocouple; a first burner, wherein the first burner is at least partially disposed in the first burner installation space, and a thermocouple installation portion is provided on the first burner, and the thermocouple is suitable for being located in the thermocouple installation portion; A second burner installation space is formed in the shell, the second burner installation space is located above the first burner installation space, and the second burner is at least partially arranged in the second burner installation space; The first burner installation space and the second burner installation space are both defined by the heat exchange portion; The heat exchange part includes a stop heat exchange part, which is arranged at the top of the first burner installation space, and the top of the first burner is stopped and limited by the stop heat exchange part.

2. The combustion heat exchange assembly according to claim 1, characterized in that: The thermocouple mounting portion is a thermocouple groove, and the thermocouple is suitable for being located in the thermocouple groove.

3. The combustion heat exchange assembly according to claim 1, characterized in that: The heat exchange part includes: an installation heat exchange part, the installation heat exchange part is arranged in the second burner installation space, and the second burner is limited by the installation heat exchange part.

4. The combustion heat exchange assembly according to claim 3, characterized in that: The heat exchange installation part comprises: A support heat exchange portion, the support heat exchange portion is located at the bottom of the second burner installation space, and the support heat exchange portion is used to support and install the second burner in the second burner installation space; The position-limiting heat exchange part is located on both sides and / or the top of the second burner installation space, and the position-limiting heat exchange part is used to limit the second burner in the second burner installation space.

5. The combustion heat exchange assembly according to any one of claims 1 to 4, characterized in that: The shell is provided with a thermocouple mounting hole, and the thermocouple is inserted into the thermocouple mounting portion after passing through the thermocouple mounting hole.

6. The combustion heat exchange assembly according to claim 5, characterized in that: The thermocouple installation portion is located inside the first burner, and an inlet end of the thermocouple installation portion is located on a side of the first burner and directly faces the thermocouple installation hole.

7. The combustion heat exchange assembly according to claim 5, characterized in that: The thermocouple installation portion is located on the upper surface of the first burner, and an inlet end of the thermocouple installation portion is located on the side of the first burner and directly faces the thermocouple installation hole.

8. A combustion heat exchange device, characterized in that: include: The combustion heat exchange component according to any one of claims 1 to 7; A premixing chamber is provided below the first burner and has a gas flow channel connected to the heat exchanger.

9. The combustion heat exchange equipment according to claim 8, characterized in that: The premixing chamber has a first burner positioning portion, and the first burner is positioned at the first burner positioning portion.

10. The combustion heat exchange equipment according to claim 8, characterized in that: Also includes: The mesh plate is arranged between the first burner and the premixing chamber and has a plurality of crisscrossing dividing ribs, and the first burner is divided into a plurality of air intake areas by the dividing ribs.

11. The combustion heat exchange equipment according to claim 10, characterized in that: The partition ribs include: a plurality of transverse partition ribs and a plurality of longitudinal partition ribs, and the plurality of transverse partition ribs and the plurality of longitudinal partition ribs are cross-arranged to form a plurality of rectangular air intake areas.

12. The combustion heat exchange equipment according to claim 10 or 11, characterized in that: The air intake areas of the plurality of air intake regions are equal.

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