CN210119011U - Combustion heat exchange assembly, gas water heater with same and wall-mounted furnace - Google Patents

Abstract

The utility model discloses a burning heat transfer assembly and have its gas heater and hanging stove. This burning heat transfer subassembly includes: the catalytic combustor is arranged inside the heat exchanger, the preheating combustor and the catalytic combustor are arranged oppositely and are used for heating the catalytic combustor, the premixing cavity is used for mixing air and gas, and the preheating combustor is arranged on the gas outlet side of the premixing cavity. According to the utility model discloses a burning heat transfer subassembly, catalytic combustor set up inside the heat exchanger for burning heat transfer subassembly's compact structure, reliable, and preheat the combustor and can heat the catalytic combustor, so that the temperature of catalytic combustor rises to suitable operating temperature interval in, prevent that gas burning is insufficient and produce too much harmful gas. The premixing cavity discharges the air and gas mixture which is uniformly mixed to the preheating burner, so that the better combustion effect is ensured.

Description

Combustion heat exchange assembly, gas water heater with same and wall-mounted furnace

Technical Field

The utility model relates to a water heater technical field particularly, relates to a burning heat transfer subassembly and have its gas heater and hanging stove.

Background

In order to reduce the emission of CO and NOx in the combustion tail gas of the gas water heater, the existing water heater manufacturers generally arrange a catalytic module (namely a burner) in a flue gas channel, namely a heat exchanger to realize the emission, but the periphery of the existing heat exchanger is closed, and the catalytic module is not convenient to install in a cavity of the heat exchanger, so that some manufacturers place the catalytic module between a primary heat exchanger and a secondary heat exchanger which are separated from each other up and down, and the catalytic module is fixed with the primary heat exchanger and the secondary heat exchanger through connecting fasteners, so that the weight of the gas water heater is increased, the integral structure is complex, the catalytic module is difficult to work in an optimum working temperature range, and a large amount of harmful gases such as CO, NOx and the like still.

In addition, the premixing cavity is an important part of the gas water heater, the premixing cavity is used for mixing air and gas, the mixing uniformity of the premixing cavity influences the combustion effect of a subsequent combustor, and the air and the gas are not uniformly mixed enough for the existing premixing cavity.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least. Therefore, the utility model provides a burning heat transfer subassembly, catalytic combustor set up inside the heat exchanger, set up preheating burner in catalytic combustor's below, set up in advance the chamber in advance in preheating burner's below, guarantee that catalytic combustor work is in suitable temperature interval and gas combustion effect is better.

The utility model also provides a gas heater of having above-mentioned burning heat exchange assemblies.

The utility model also provides a hanging stove of having above-mentioned burning heat exchange assemblies.

According to the utility model discloses burning heat exchange assemblies includes: the heat exchanger is internally provided with a heat exchange part and is connected with a cold water inlet pipe and a hot water outlet pipe; a catalytic burner disposed inside the heat exchanger, and at least a portion of the heat exchanging portion is located above the catalytic burner; a preheating burner disposed opposite the catalytic burner, the preheating burner for heating the catalytic burner; the preheating burner is arranged on the air outlet side of the premixing cavity.

According to the utility model discloses burning heat transfer assembly, catalytic combustor set up inside the heat exchanger for burning heat transfer assembly's compact structure, reliable, and preheat the combustor and can heat catalytic combustor, so that catalytic combustor's temperature rises to suitable operating temperature interval in, prevent that gas burning is insufficient and produce too much harmful gas. The premixing cavity discharges the air and gas mixture which is uniformly mixed to the preheating burner, so that the better combustion effect is ensured.

According to some embodiments of the invention, the premix chamber comprises: a cavity having an air inlet side and an air outlet side; at least one level of air distribution plate, the at least one level of air distribution plate is configured in the cavity, and the at least one level of air distribution plate separates the air inlet side and the air outlet side.

Further, the at least one level of air distribution plate comprises: the air distribution plate comprises a first-stage air distribution plate and a second-stage air distribution plate, wherein the first-stage air distribution plate is close to the air inlet side, and the second-stage air distribution plate is close to the air outlet side.

Specifically, the at least one stage of air distribution plate is a multi-stage air distribution plate, the multi-stage air distribution plate is arranged in the cavity at intervals, so that air and fuel gas entering the cavity from the air inlet side sequentially pass through the multi-stage air distribution plate and then are discharged into the heat exchanger from the air outlet side, wherein the air distribution plate is used for mixing the fuel gas and the air.

Furthermore, the first-level air distribution plate is provided with a diversion guide structure, and the diversion guide structure is used for conducting diversion guide on the air and the fuel gas entering the cavity from the air inlet side.

Specifically, the cavity includes: the gas-liquid separation device comprises a cavity body and an inlet part, wherein the inlet part is arranged on the cavity body, the inlet part is constructed to be at the gas inlet side, the inlet part is provided with an air inlet and a gas inlet, and the air inlet is opposite to the flow-dividing guide structure.

According to some embodiments of the utility model, the one-level grid plate includes: the first section and the second section are positioned on two sides of the flow dividing guide structure, and the flow dividing guide structure is opposite to the first section and the second section and protrudes towards the air inlet side.

Further, the diversion guide structure comprises: the first inclined plane section is connected with the first section, and the second inclined plane section is connected with the second section.

According to some embodiments of the utility model, reposition of redundant personnel guide structure first section with all be provided with one-level cloth wind aperture on the second section, and first section with still be provided with one-level cloth wind macropore on the second section, the equipartition has second grade cloth wind hole on the second grade cloth wind board.

According to some embodiments of the invention, the heat exchanger is provided with a burner holding structure inside, the catalytic burner being held by the burner holding structure.

Optionally, the burner holding structures are arranged on both sides of the catalytic burner, respectively, and the burner holding structure of each side clamps the catalytic burner.

According to some embodiments of the invention, the burner holding structure comprises: a clamping groove in which a portion of the catalytic combustor is fitted.

Further, the clamping groove forms a clamping fit with the catalytic burner on at least two sides.

According to some embodiments of the invention, the burner holding structure is a pair of spaced apart "U" shaped structures with openings facing each other.

Specifically, the heat exchanger includes: the combustor comprises peripheral enclosing plates and the heat exchanging part arranged in the peripheral enclosing plates, and the combustor holding structure is arranged on two opposite inner wall surfaces of the peripheral enclosing plates.

According to some embodiments of the invention, the burner holding structure has a channel therein, the channel communicating with a heat exchange medium channel in the heat exchanger.

Further, the heat exchanger has a water inlet and a water outlet, the water inlet being in communication with the cold water inlet tube, the water outlet being in communication with the hot water outlet tube, the channel within the burner retention structure being closer to the water inlet than the water outlet.

According to the utility model discloses a some embodiments, be formed with installation space in the heat exchanger, heat transfer portion includes: the catalytic combustor comprises a supporting heat exchange part and a limiting heat exchange part, wherein the supporting heat exchange part and the limiting heat exchange part are the combustor holding structure, the supporting heat exchange part is used for supporting the catalytic combustor, and the limiting heat exchange part is used for limiting the catalytic combustor in the installation space.

Further, the heat exchanger is of a split structure and comprises: the catalytic combustor is arranged at the joint of the split upper body and the split lower body, and the catalytic combustor is hidden inside the upper body and the lower body.

Still further, spacing heat transfer portion includes: the catalytic combustor comprises a top limit heat exchange part and a side limit heat exchange part, wherein the top limit heat exchange part is positioned at the top of the catalytic combustor and is used for limiting the top of the catalytic combustor, and the side limit heat exchange part is positioned on the side surface of the catalytic combustor and is used for limiting the catalytic combustor in the lateral direction.

Optionally, the upper body is configured as an upper heat exchanger and the lower body is configured as a lower heat exchanger, the top-limiting heat exchanging portion is a portion of the upper body, and the side-limiting heat exchanging portion and the supporting heat exchanging portion are portions of the lower body.

According to some embodiments of the invention, the preheating burner is a honeycomb ceramic burner.

According to some embodiments of the invention, the catalytic combustor is a ceramic foam combustor on which a catalyst is coated.

According to some embodiments of the utility model, cold water advances to be provided with the water intaking valve on the pipe, cold water advance the pipe with be connected with the bypass pipeline between the hot water exit tube, be provided with the bypass valve on the bypass pipeline, the water intaking valve the bypass valve all links to each other with the water main.

According to the utility model discloses another aspect embodiment's gas heater, including foretell burning heat exchange assemblies.

According to the utility model discloses hanging stove of third aspect embodiment, including foretell burning heat transfer subassembly.

Drawings

FIG. 1 is a perspective assembly schematic view of a combustion heat exchange assembly;

FIG. 2 is a perspective cut-away schematic view of a combustion heat exchange assembly;

FIG. 3 is a cross-sectional view of a combustion heat exchange assembly;

FIG. 4 is an exploded schematic view of a combustion heat exchange assembly;

FIG. 5 is a schematic view of an embodiment in which the burner holding structure is a heat exchange tube;

FIG. 6 is an assembled schematic view of a gas water heater;

FIG. 7 is a front view of a premix chamber for a gas water heater;

FIG. 8 is a top view of a premix chamber for a gas water heater;

FIG. 9 is a sectional view A-A of FIG. 8;

FIG. 10 is a bottom view of a premix chamber for a gas water heater;

FIG. 11 is a right side view of the premix chamber for the gas water heater;

FIG. 12 is an assembled schematic view of a combustion heat exchange assembly;

FIG. 13 is an exploded schematic view of a combustion heat exchange assembly;

FIG. 14 is a cross-sectional view of a combustion heat exchange assembly;

FIG. 15 is a schematic view of the upper and lower bodies forming a parallel configuration;

FIG. 16 is a schematic view of the upper and lower bodies forming a tandem configuration;

FIG. 17 is an assembled schematic view of the upper body;

FIG. 18 is an exploded schematic view of the upper body;

FIG. 19 is an assembled schematic view of the lower body;

fig. 20 is an exploded schematic view of the lower body.

Reference numerals:

the gas water heater 100, the combustion heat exchange assembly 10, the heat exchanger 1, the upper body 11, the upper body flange 111, the heat exchanger flange 1110, the heat exchange fin 112, the upper front plate 113, the upper rear plate 114, the upper left plate 115, the upper right plate 116, the upper left inner plate 117, the upper right inner plate 118, the front plate 1130, the rear plate 1140, the left plate 1150, the right plate 1160, the right plate via hole 1161, the left inner plate 1170, the right inner plate 1180, the right inner plate via hole 1181, the lower body 12, the lower body flange 121, the observation window 122, the lower front plate 123, the lower rear plate 124, the lower left plate 125, the lower right plate 126, the lower left inner plate 127, the lower right inner plate 128, the heat exchange hole 13, the heat exchange convex hull 14, the catalytic combustor 2, the heat exchange portion 3, the supporting heat exchange portion 31, the middle group supporting heat exchange portion 311, the first side group supporting heat exchange portion 312, the second side group supporting heat exchange portion 313, the limiting heat exchange portion 32, the top limiting heat exchange portion 321, the first side group top limiting, The second side group top limit heat exchange portion 3212, the side limit heat exchange portion 322, the upper heat exchange portion 331, the lower heat exchange portion 332, the lower space 34, the upper space 35, the water inlet 36, the water outlet 37, the peripheral enclosing plate 38, the middle connecting pipe 39, the mounting space 4, the burner holding structure 5, the upper wall 51, the connecting wall 52, the lower wall 53, the holding groove 54, the premixing cavity 6, the cavity 61, the air inlet side (inlet portion) 611, the air inlet 6111, the gas inlet 6112, the air outlet side 612, the cavity body 613, the first inclined bottom wall 6131, the second inclined bottom wall 6132, the flanging 614, the air distribution plate 6230, the primary air distribution plate 62, the diversion guide structure 621, the first inclined section 6211, the second inclined section 6212, the windward section 6213, the first section 622, the second section 623, the primary air distribution small hole 624, the secondary air distribution plate 63, the secondary air distribution hole 631, the preheating burner 7, the mounting bracket 8, and the mounting hole 81, A cold water inlet pipe 91, a water inlet valve 911, a hot water outlet pipe 92, a fan 93, a gas connecting pipe 94, a gas valve 941, a bypass pipeline 95, a valve 951, a cold water three-way pipe 961, a hot water three-way pipe 962, a smoke exhaust hood 97, a controller 98 and a water main 99.

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 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 exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present 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", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The combustion heat exchange assembly 10 according to an embodiment of the present invention is described in detail below with reference to fig. 1 to 20.

Referring to fig. 1, a combustion heat exchange assembly 10 according to an embodiment of the present invention may include: heat exchanger 1, catalytic combustor 2, preheating combustor 7 and premix chamber 6 have heat transfer portion 3 in the heat exchanger 1, have the heat transfer medium passageway in the heat transfer portion 3, and heat exchanger 1 is connected with cold water and advances pipe 91 and hot water exit tube 92. Cold water enters the heat exchanger 1 through the cold water inlet pipe 91, water flows in the heat exchange medium channel, is heated by the catalytic combustor 2 to become hot water, and is discharged from the hot water outlet pipe 92 of the combustion heat exchange assembly 10 for users to use.

The catalytic burner 2 is disposed inside the heat exchanger 1, and at least a part of the heat exchanging portion 3 (i.e., the upper heat exchanging portion 331 mentioned below) is located above the catalytic burner 2, and the preheating burner 7 may be disposed inside the heat exchanger 1 or outside the heat exchanger 1, the preheating burner 7 being disposed opposite the catalytic burner 2, for example, in the example of fig. 3, the preheating burner 7 is located below the catalytic burner 2, and the preheating burner 7 is used to heat the catalytic burner 2. In some embodiments, not shown, the preheating burner 7 may be located above or to the side of the catalytic burner 2, provided that the catalytic burner 2 is located on the downstream side of the preheating burner 7 in the flow direction of the gas stream.

For convenience of description, the preheating burner 7 is illustrated as being located below the catalytic burner 2, but should not be construed as limiting the relative position of the preheating burner 7 and the catalytic burner 2. When the combustion heat exchange assembly 10 works, the heat radiated by the preheating burner 7 upwards reaches the catalytic burner 2 to heat the catalytic burner 2, so that the temperature of the catalytic burner 2 is increased to a proper working temperature range, the catalytic burner 2 can play the best catalytic combustion role in the working temperature range, and when air and gas mixed gas is combusted in the catalytic burner 2, the combustion is sufficient, so that the amount of harmful gas such as CO, NOx and the like generated due to insufficient combustion is greatly reduced.

The heat exchanger 1 can be made of stainless steel or copper, and has good heat exchange effect and strong corrosion resistance.

The premix chamber 6 is mounted to the heat exchanger 1, and similarly, the premix chamber 6 may be provided inside the heat exchanger 1 or outside the heat exchanger 1. The premixing cavity 6 is used for mixing air and fuel gas to realize premixing of the air and the fuel gas. Referring to fig. 2, 6 and 9, the preheating burner 7 is disposed at the outlet side 612 of the premixing chamber 6 so that the air-gas mixture discharged from the outlet side 612 is burned at the preheating burner 7. The premixing cavity 6 can improve the mixing uniformity of air and gas, so that the combustibility of the air-gas mixture is improved, and the air-gas mixture can be fully combusted in a combustion stage.

According to the utility model discloses burning heat exchange assemblies 10, catalytic combustor 2 sets up inside heat exchanger 1 for burning heat exchange assemblies 10's compact structure, reliable, and preheating burner 7 can heat catalytic combustor 2, so that catalytic combustor 2's temperature rises to suitable operating temperature interval in, prevents that gas combustion is insufficient and produce too much harmful gas. The premixing cavity 6 discharges the air-gas mixture which is uniformly mixed to the preheating burner 7, so that the better combustion effect is ensured.

The premix chamber 6 will be described in detail below with reference to fig. 2, 6-11.

Referring to fig. 7-9, premix chamber 6 may include: the gas-fuel heat exchanger comprises a cavity 61 and at least one stage of air distribution plate 6230, wherein the cavity 61 is provided with an air inlet side 611 and an air outlet side 612, the air distribution plate 6230 is arranged in the cavity 61, and the air distribution plate 6230 separates the air inlet side 611 from the air outlet side 612, so that air and gas entering the cavity 61 from the air inlet side 611 are exhausted into the heat exchanger 1 from the air outlet side 612 after passing through the air distribution plate 6230, as shown in fig. 2 and 6. Wherein the air distribution plate 6230 is used to mix gas and air.

In some embodiments, the at least one stage of air distribution plate is a multi-stage air distribution plate 6230, and the multi-stage air distribution plate 6230 is disposed in the cavity 61 at intervals, so that the air and the fuel gas entering the cavity 61 from the air inlet side 611 pass through the multi-stage air distribution plate 6230 in sequence and then are discharged into the heat exchanger 1 from the air outlet side 612, as shown in fig. 2 and 6.

In other words, after the air and the fuel gas enter the cavity 61 from the air inlet side 611, the air and the fuel gas are primarily mixed at the position of the air inlet side 611, and then the air and the fuel gas sequentially pass through the multi-stage air distribution plates 6230, when the air and the fuel gas pass through each stage of air distribution plates 6230, the air and the fuel gas are primarily mixed, and finally the air and the fuel gas are discharged from the air outlet side 612, and the air and the fuel gas after passing through the multi-stage air distribution plates 6230 are uniformly mixed and have good combustibility, so that the air-fuel gas mixture coming out from the air outlet side 612 can be fully combusted after entering the preheating combustor 7.

The air intake side 611 may be centered, left or right to avoid other components of the gas water heater according to actual needs.

The multi-stage grid 6230 can have one grid 6230, two grids 6230, or more grids 6230. The multi-stage air distribution plates 6230 have a space therebetween, which can provide a buffer space for the air-fuel mixture.

Premixing chamber 6 can realize premixing to air and gas to multistage grid 6230 can mix air and gas many times, thereby improves the degree of consistency that air and gas mix, and then promotes the combustible property of air gas mixture, makes air gas mixture can fully burn in the burning stage.

In the embodiment shown in fig. 8-10, the multi-stage aerofoil 6230 comprises: a primary air distribution plate 62 and a secondary air distribution plate 63, wherein the primary air distribution plate 62 is close to the air inlet side 611, the secondary air distribution plate 63 is close to the air outlet side 612, the secondary air distribution plate 63 is arranged at the downstream side of the primary air distribution plate 62 when viewed from the air flowing direction, and as shown in fig. 9, the secondary air distribution plate 63 is arranged above the primary air distribution plate 62. The air and the fuel gas entering the cavity 61 from the air inlet side 611 pass through the primary air distribution plate 62, then pass through the secondary air distribution plate 63, and finally are discharged from the air outlet side 612.

Specifically, as shown in fig. 9, the primary air distribution plate 62 has a diversion guide structure 621, and the diversion guide structure 621 is used for diverting and guiding the air and the fuel gas entering into the cavity 61 from the air inlet side 611. The diversion guide structure 621 can scatter the air-fuel mixture entering the cavity 61 from the air inlet side 611, so that the air-fuel mixture is diverted to the left and right sides, thereby further improving the mixing uniformity of the air and the fuel.

Further, the cavity 61 includes: a chamber body 613 and an inlet portion 611, wherein the inlet portion 611 is mounted to the chamber body 613, as shown in fig. 9, the inlet portion 611 is mounted below the chamber body 613, and the inlet portion 611 and the chamber body 613 are preferably integrally formed, and the chamber body 613 and the inner cavity of the inlet portion 611 communicate with each other. The inlet part 611 is configured as the air inlet side 611, the inlet part 611 is provided with an air inlet 6111 and a fuel gas inlet 6112, air enters the cavity 61 through the air inlet 6111, fuel gas enters the cavity 61 through the fuel gas inlet 6112, the air inlet 6111 is separated from the fuel gas inlet 6112, the air inflow of the air and the fuel gas can be independently adjusted, and the adjustment of the proportion of the air and the fuel gas is facilitated, so that the combustion requirement is met.

Referring to fig. 6, a fan 93 is connected to an air inlet 6111, the fan 93 blows air into the cavity 61 from the air inlet 6111, a gas connecting pipe 94 is connected to the gas inlet 6112 to blow gas into the cavity 61 from the gas inlet 6112, a gas valve 941 is disposed on the gas connecting pipe 94, and the gas amount can be adjusted by adjusting the valve size of the gas valve 941.

Further, the air inlet 6111 is opposite to the diversion guide 621. The air entering the cavity 61 from the air inlet 6111 and the fuel gas entering the cavity 61 from the fuel gas inlet 6112 flow upward along the air inlet 6111 shown in fig. 9 under the action of gas pressure, the diversion guide structure 621 is opposite to the air inlet 6111, so that the air-fuel gas mixture can directly impact the diversion guide structure 621, the diversion guide structure 621 divides the air-fuel gas mixture into a part flowing leftwards and a part flowing rightwards, the diversion process can disperse the air and the fuel gas, and the degree of mixing the air and the fuel gas is increased.

Specifically, as shown in fig. 9, the inlet portion 611 is located at the bottom of the cavity body 613, the air inlet 6111 is located at the bottom surface of the inlet portion 611, the gas inlet 6112 is located on the outer wall of the side surface of the inlet portion 611, and the air inlet 6111 and the gas inlet 6112 are perpendicular. Thus, the impact force of the air entering the cavity 61 from the air inlet 6111 and the gas entering the cavity 61 from the gas inlet 6112 is large at the inlet portion 611, and the air and the gas collide, thereby accelerating the mixing of the air and the gas.

Referring to fig. 9, the primary air distribution plate 62 may include: a first segment 622 and a second segment 623 located on either side of the diverging guide 621, the diverging guide 621 projecting towards the inlet side 611 opposite the first segment 622 and the second segment 623. The first segment 622 is located on the left side of the flow dividing guide structure 621, the second segment 623 is located on the right side of the flow dividing guide structure 621, and the flow dividing guide structure 621 is configured into a similar conical structure protruding toward the intake side 611, thereby making the flow dividing guide effect of the flow dividing guide structure 621 on the air-fuel mixture more remarkable when the air and fuel gas from the intake side 611 reach the flow dividing guide structure 621.

Specifically, the diversion guide structure 621 includes: a first beveled segment 6211 and a second beveled segment 6212, the first beveled segment 6211 being connected to the first segment 622 and the second beveled segment 6212 being connected to the second segment 623. The first inclined surface section 6211 and the second inclined surface section 6212 are arranged in a V shape, the first inclined surface section 6211 guides a part of the air-fuel mixture to the left side, and the second inclined surface section 6212 guides a part of the air-fuel mixture to the right side.

Further, a windward section 6213 is arranged between the first inclined section 6211 and the second inclined section 6212, and the angle between the first inclined section 6211 and the first section 622 is between 15 ° and 75 °, and the angle between the second inclined section 6212 and the second section 623 is between 15 ° and 75 °. For example, the first beveled segment 6211 is angled at 45 ° to the first segment 622 and the second beveled segment 6212 is angled at 30 ° to the second segment 623. It should be noted that the angle is defined as an acute angle, which refers to the angle between the plane of the first inclined surface segment 6211 and the plane of the first segment 622 (or the angle between the plane of the second inclined surface segment 6212 and the plane of the second segment 623), and in practical configurations, the angle may be represented as an obtuse angle.

Specifically, the cavity 61 includes: the cavity body 613, the diapire of cavity body 613 is formed with the first slope diapire 6131 that corresponds with first section 622, the first slope diapire 6131 is the same with the slope direction of first inclined plane section 6211, the diapire of cavity body 613 is formed with the second slope diapire 6132 that corresponds with second section 623, the slope direction of second slope diapire 6132 is the same with the slope direction of second inclined plane section 6212. Note that "the inclination directions are the same" is not limited to the inclination angles being completely the same, as long as both have the same inclination tendency. For example, the first inclined bottom wall 6131 and the first inclined surface section 6211 are inclined to the upper left, and the second inclined bottom wall 6132 and the second inclined surface section 6212 are inclined to the upper right.

The diversion guide structure 621, the first section 622 and the second section 623 are all provided with primary air distribution small holes 624, as shown in fig. 10, the windward section 6213 can also be provided with the primary air distribution small holes 624, and the first section 622 and the second section 623 are also provided with primary air distribution large holes (not shown in the figure). When the air and the fuel gas pass through the primary air distribution small holes 624 or the primary air distribution big holes, the passing area of the gas is suddenly reduced, so that the flowing speed of the gas at the primary air distribution small holes 624 or the primary air distribution big holes can be accelerated, and the air and the fuel gas can be further mixed. The aperture of the first-level air distribution big hole is larger than that of the first-level air distribution small hole 624, so that the gas circulation speed of the first-level air distribution plate 62 can be properly increased, and the first-level air distribution plate 62 is prevented from being damaged due to the fact that the gas pressure on the first-level air distribution plate 62 is too large due to the fact that the aperture is too small.

Referring to fig. 9, the first segment 622 and the second segment 623 are in the same plane, and the first segment 622 and the second segment 623 are both parallel to the secondary air distribution plate 63, so that the pressure of air and fuel gas between the primary air distribution plate 62 and the secondary air distribution plate 63 is relatively uniform.

The second air distribution plate 63 is uniformly provided with second air distribution holes 631. The air between the first level air distribution plate 62 and the second level air distribution plate 63 reaches the air outlet side 612 through the second level air distribution holes 631, and the air and the fuel gas can be mixed again at the second level air distribution holes 631, so that the mixing uniformity is further improved.

Referring to fig. 2, 7-11, the top of the cavity 61 is further provided with an annular flange 614, and the flange 614 is adapted to support the fixed preheating burner 7 to enhance the installation firmness of the preheating burner 7.

Referring to fig. 1 to 5 and 14, a burner holding structure 5 is provided inside the heat exchanger 1, and the catalytic burner 2 is held by the burner holding structure 5, so that the catalytic burner 2 is correctly positioned inside the heat exchanger 1, and the catalytic burner 2 is prevented from shaking inside the heat exchanger 1 to damage the catalytic burner 2 itself or damage the heat exchanger 1.

Referring to the embodiment shown in fig. 1-5, the burner holding structures 5 are arranged on both sides of the catalytic burner 2, respectively, and after assembly, the position of the burner holding structures 5 in the heat exchanger 1 is fixed, whereby the positioning of the catalytic burner 2 by the burner holding structures 5 is more reliable.

Specifically, as shown in fig. 2 to 3, the burner holding structure 5 includes: and a holding groove 54 in which a part of the catalytic combustor 2 is fitted, the holding groove 54 being capable of applying a clamping force to the catalytic combustor 2 to prevent the catalytic combustor 2 from shaking.

Further, the clamping groove 54 and the catalytic combustor 2 form clamping cooperation on at least two sides, so that a good clamping effect is ensured.

Specifically, in the embodiment shown in fig. 3, the burner holding structure 5 may include: an upper wall 51, a lower wall 53 and a connecting wall 52 connected between the outer sides of the upper wall 51 and the lower wall 53, the upper wall 51, the connecting wall 52 and the lower wall 53 enclosing a clamping groove 54 open towards the catalytic burner 2, the clamping groove 54 forming a clamping fit with the catalytic burner 2 on three sides. The upper wall 51, the connecting wall 52 and the lower wall 53 constitute a "U" shaped structure.

Alternatively, the burner holding structures 5 are a pair of spaced apart "U" shaped structures with their openings facing each other, and the catalytic burner 2 is held between the holding grooves 54 of the two burner holding structures 5, and is fixed more firmly.

In some alternative embodiments, a buffer structure (not shown) is disposed between the burner holding structure 5 and the catalytic burner 2, and the buffer structure may be a sponge, which plays a role of buffer protection to prevent the burner holding structure 5 from having too large clamping force to damage the catalytic burner 2.

In some embodiments, not shown, the burner-holding structure 5 is a pair of "L" -shaped structures and comprises a first limb, two opposite each other, and a second limb, connected at the bottom of the first limb and two supporting the catalytic burner 2. The first limb corresponds to the connecting wall 52 in fig. 3 and the second limb corresponds to the lower wall 51 in fig. 3.

As shown in fig. 1 and 3, the heat exchanger 1 includes: a surrounding enclosing plate 38 and a heat exchanging part 3 arranged in the surrounding enclosing plate 38, and a burner holding structure 5 is arranged on two opposite inner wall surfaces of the surrounding enclosing plate 38. Alternatively, the burner holding structure 5 is fixed on the corresponding inner wall surface.

Referring specifically to fig. 2 and 4, the peripheral wall 38 of the heat exchanger 1 includes a front plate 1130, a rear plate 1140, a left plate 1150, and a right plate 1160, a left inner plate 1170, and a right inner plate 1180 are disposed between the left plate 1150 and the right plate 1160, and the burner holding structure 5 is fixed to the inner wall surfaces of the front plate 1130 and the rear plate 1140. As shown in fig. 3, the front and rear plates 1130, 1140 are provided with receiving grooves on their surfaces facing each other, and the burner holding structure 5 is disposed in the receiving grooves of the front and rear plates 1130, 1140, thereby achieving the positioning of the burner holding structure 5 in the heat exchanger 1.

The heat exchanging portion 33 is provided between the left inner plate 1170 and the right inner plate 1180. The left inner plate 1170 and the right inner plate 1180 are provided with heat exchange holes 13, heat exchange convex hulls 14 corresponding to the heat exchange holes 13 are arranged on the surface of the left inner plate 1170 facing the left plate 1150 and the surface of the right inner plate 1160 facing the right inner plate 1180, water entering the heat exchanger 1 from the water inlet 36 enters the heat exchange convex hulls 14 firstly and then enters the heat exchange holes 13 from the heat exchange convex hulls 14, and then enters the heat exchange parts 33 corresponding to the heat exchange holes 13.

The front plate 1130, the rear plate 1140, the left plate 1150 and the right plate 1160 can be fixedly connected through bolt fasteners, and when the catalytic combustor 22 needs to be disassembled, the catalytic combustor 22 can be disassembled from the side face only by disassembling the front plate 1130 or the rear plate 1140, so that the operation is convenient.

The heat exchanger flanges 111 are arranged at the lower parts of the front plate 1130 and the rear plate 1140, and the heat exchanger flanges 111 and the outer flanges 614 of the premix chamber 6 are fixed through fasteners to complete the assembly of the heat exchanger 1 and the premix chamber 6.

The front panel 1130 is also provided with an observation window 122 for facilitating observation of the combustion condition of the catalytic combustor 2 inside the heat exchanger 1.

The burner holding structure 5 has a passage therein, which communicates with the heat exchange medium passage in the heat exchange portion 3. The internal passages of the burner retaining structure 5 are filled with water and can be used to cool the catalytic burner 2. The water flow can circulate in the channel and the heat exchange medium channel, and after being heated by the catalytic burner 2, the water flow is discharged from the water outlet 37 and the hot water outlet pipe 92 of the combustion heat exchange assembly 10 for users to use.

Further, referring to fig. 1, the heat exchanger 1 has a water inlet 36 and a water outlet 37, the water inlet 36 is communicated with a cold water inlet pipe 91, the water outlet 37 is communicated with a hot water outlet pipe 92, and the passage in the burner holding structure 5 is closer to the water inlet 36 than the water outlet 37. In other words, the water outlet 37 is located above the water inlet 36, and the distance between the channel in the burner holding structure 5 and the water inlet 36 is smaller than the distance between the channel in the burner holding structure 5 and the water outlet 37. Because the cold water with lower temperature enters the heat exchanger 1 from the water inlet 36 and becomes hot water with higher temperature after being heated and flows out from the water outlet 37, the channel in the burner holding structure 5 is close to the water inlet 36, so that the water in the channel of the burner holding structure 5 can be kept at lower temperature, and therefore, the burner holding structure 5 can play a role in cooling the catalytic burner 2.

The burner holding structure 5 is arranged at the side of the catalytic burner 2, and the energy radiated by the catalytic burner 2 is mostly passed upwards through the heat exchanger 1, and only a small part is radiated to the burner holding structure 5 at the side, so that the temperature of the water in the passage of the burner holding structure 5 is significantly lower than the temperature of the water in the heat exchanging part 3.

Specifically, in the combustion stage of the catalytic combustor 2, the temperature of the catalytic combustor 2 will be higher and higher, so that the temperature of the catalytic combustor 2 exceeds the suitable working temperature range, and at this time, because the temperature of water in the channel of the combustor holding structure 5 is lower than the temperature of the catalytic combustor 2, under the effect of heat transfer, the combustor holding structure 5 can cool down the catalytic combustor 2, so that the catalytic combustor 2 is restored to the optimum working temperature range again, and the generation of harmful gas is reduced.

When the user need not use hot water, catalytic combustor 2 stops work temporarily, combustor retaining structure 5 continues to cool down catalytic combustor 2, effectively reduce catalytic combustor 2's inside temperature, make the heat accumulation of cutting off the water reduce, can the effective control temperature rise of cutting off the water, that is to say, can avoid in the stage of cutting off the water, catalytic combustor 2's high temperature waste heat lasts and heats the water in the heat transfer portion 3, and the temperature that leads to delivery port 37 lasts the rising, also can avoid catalytic combustor 2 to last overheated and influence catalytic combustor 2's life simultaneously.

Specifically, as shown in fig. 1 to 3, an upper heat exchanging portion 331 is provided at an upper portion of the burner holding structure 5, a lower heat exchanging portion 332 is provided at a lower portion of the burner holding structure 5, the lower heat exchanging portion 332 is connected to the water inlet 36, and the upper heat exchanging portion 331 is connected to the water outlet 37. The water from the water source enters the lower heat exchanging portion 332 from the water inlet 36, flows through the lower heat exchanging portion 332, enters the upper heat exchanging portion 331, and finally flows out from the water outlet 37. The passage in the burner holding structure 5 communicates the lower heat exchanging portion 332 and the upper heat exchanging portion 331.

Further, at least a part of the upper heat exchanging portions 331 is located directly above the burner holding structures 5 and the catalytic burner 2, the lower heat exchanging portions 332 are divided into two groups spaced apart, and the two groups of the lower heat exchanging portions 332 are located directly below the two burner holding structures 5, respectively.

The water entering the heat exchanger 1 from the water inlet 36 flows through the lower heat exchanging portion 332, the burner holding structure 5 and the upper heat exchanging portion 331 in sequence, and finally flows out from the water outlet 37, and the number of times of the water returning through the lower heat exchanging portion 332 is less than that of the water returning through the upper heat exchanging portion 331, so that the retention time of the water in the upper heat exchanging portion 331 can be increased, the catalytic burner 2 can fully heat the water in the upper heat exchanging portion 331, and the water temperature can be ensured to reach the water temperature required by the user quickly.

Alternatively, the lower heat exchanging portion 332 is sparse compared to the upper heat exchanging portion 331. In other words, the number of the upper heat exchanging parts 331 is greater than the number of the lower heat exchanging parts 332, thereby contributing to further increasing the heating efficiency of the water temperature, to shorten the heating time taken to bring the water temperature to the target value, and to improve the user satisfaction.

The heat exchange fins 112 are disposed on the upper heat exchanging portion 331, so that a heat exchange area of the upper heat exchanging portion 331 can be increased, thereby improving heat exchange efficiency.

The sectional area of the cross section of the burner holding structure 5 is larger than that of the cross section of any one of the heat exchanging portions 3, so that the contact area between the burner holding structure 5 and the catalytic burner 2 can be increased, the clamping reliability of the burner holding structure 5 for the catalytic burner 2 is improved, meanwhile, the water flow in the burner holding structure 5 can be ensured to be larger, when water flows pass through the burner holding structure 5, more redundant combustion heat of the catalytic burner 2 can be taken away, and the cooling effect of the burner holding structure 5 for the catalytic burner 2 is improved.

Further, referring to fig. 1 and 4, the combustion heat exchange assembly 10 further includes: the mounting bracket 8 is arranged on the surrounding enclosing plate 38, the mounting bracket 8 corresponds to the end part of the catalytic combustor 2, and the mounting bracket 8 is provided with a mounting hole 81.

Further, the mounting hole 81 is used for mounting a thermocouple or a photo resistor. The right plate 1160 is provided with a right plate through hole 1161, the right inner plate 1180 is provided with a right inner plate through hole 1181, and the right plate through hole 1161, the right inner plate through hole 1181 and the mounting hole 81 are aligned, so that when a thermocouple or a photoresistor is mounted in the mounting hole 81, the thermocouple or the photoresistor can be inserted into a position close to the catalytic combustor 2 through the right plate through hole 1161 and the right inner plate through hole 1181, so that the temperature of the catalytic combustor 2 can be monitored more accurately.

In the embodiment shown in fig. 12 to 20, in which the installation space 4 is formed in the heat exchanger 1, as shown in fig. 14, the catalytic combustor 2 is at least partially disposed in the installation space 4, and the catalytic combustor 2 is positioned by the heat exchanging portion 3, that is, a part of the heat exchanging portion 3 serves as the combustor holding structure 5 holding the catalytic combustor 2 in the installation space 4. When the catalytic combustor 2 burns, the heat generated by combustion can be transmitted to the cold water in the heat exchange medium channel of the heat exchange part 3 through the heat exchanger 1, so that the cold water is heated, the temperature of the water flow in the heat exchange medium channel of the heat exchange part 3 is increased, and the use requirement of a user on the hot water is met. At the same time, the water flow in the heat exchange part 3 positioned for the catalytic burner 2 can also take away the heat generated by the combustion of the catalytic burner 2.

The heat exchanging part 3 may be provided with heat exchanging fins 112, so that a heat exchanging area of the heat exchanging part 3 may be increased, thereby improving heat exchanging efficiency.

Through using heat transfer portion 3 to fix a position catalytic combustor 2, realized catalytic combustor 2 in the inside location and the installation of heat exchanger 1, simultaneously, can also take away the heat that catalytic combustor 2 burnt production for rivers in the heat transfer portion 3 of catalytic combustor 2 location, prevent that catalytic combustor 2 from lasting to heat exchanger 1 and making the play water temperature of burning heat exchange assemblies 10 be higher than user's user demand. In addition, the catalytic combustor 2 is embedded in the heat exchanger 1, and a connecting fastener between the catalytic combustor 2 and the heat exchanger 1 is omitted, so that the structure of the combustion heat exchange assembly 10 is more compact, and the weight of the combustion heat exchange assembly 10 is favorably reduced.

Referring to fig. 14, the heat exchanging portion 3 serving as the burner holding structure 5 includes: a supporting heat exchanging portion 31 for supporting the catalytic combustor 2, and a limiting heat exchanging portion 32 for limiting the catalytic combustor 2 within the installation space 4. It is particularly pointed out that the supporting heat exchanging part 31 and the limiting heat exchanging part 32 are both supporting and limiting structures, and water flow in the heat exchanging part 3 can take away heat generated during combustion of the catalytic combustor 2, so that the problems that a common mounting bracket is easy to deform due to high temperature and cannot mount and fix the catalytic combustor 2 are solved.

Further, the supporting heat exchanging part 31 is located at the bottom of the installation space 4, and the limiting heat exchanging part 32 is located at both sides and/or the top of the installation space 4. In the example of fig. 14, the limit heat exchanging part 32 is located at both sides and the top of the installation space 4. In some embodiments, not shown, the limiting heat exchanging part 32 may be located only at both sides of the installation space 4, or only at the top of the installation space 4.

Specifically, the supporting heat exchanging part 31 and the spacing heat exchanging part 32 are arranged around the installation space 4. As shown in fig. 14, the supporting heat exchanging part 31 is disposed at the bottom of the installation space 4, and the spacing heat exchanging parts 32 are disposed at both sides and the top of the installation space 4.

Referring to fig. 12 to 14, the heat exchanger 1 is a split structure, and the heat exchanger 1 includes: go up body 11 and lower body 12, go up body 11 and set up the top at lower body 12, and go up body 11 and lower body 12 and link to each other, catalytic combustor 2 sets up the junction at the last body 11 of components of a whole that can function independently and lower body 12, and catalytic combustor 2 sets up the inside at heat exchanger 1 promptly.

Optionally, the upper body 11 and the lower body 12 can be made of stainless steel, the upper body 11 and the lower body 12 can also be made of copper, and the heat exchange effect is good and the corrosion resistance is high.

The upper body 11 and the lower body 12 adopt a split structure, so that the catalytic combustor 2 is convenient to produce, assemble and replace after sale. Go up body 11, catalytic combustor 2, lower body 12 top-down arranges, supports catalytic combustor 2 through supporting heat transfer portion 31, fixes a position, presss from both sides tight catalytic combustor 2 through spacing heat transfer portion 32, and need not other fastening structure, is favorable to reducing from this to connect spare part quantity, needn't use even to connect spare part completely to the total weight of burning heat exchange assemblies 10 has been alleviateed. When the catalytic combustor 2 is replaced, the catalytic combustor 2 can be taken out for replacement by disassembling the upper body 11 and the lower body 12, and the operation is convenient and quick.

The catalytic combustor 2 is hidden in the upper body 11 and the lower body 12, so that the heat exchanger 1 and the catalytic combustor 2 are integrated, the aesthetic property of the combustion heat exchange assembly 10 is favorably improved, the heat loss of the catalytic combustor 2 is reduced, most of heat is enabled to pass through the upper body 11, and the heating efficiency of the water flow in the heat exchanger 1 is improved. Meanwhile, the catalytic burner 2 can be installed or detached from the lower body 12 only by detaching the upper body 11, and the operation is convenient and quick.

In addition, because the upper body 11 and the lower body 12 are of a split structure, the universality is strong, the lower body 12 can be matched with bodies with different numbers of heat exchange fins 112, the heat exchange requirements of gas water heaters with different capacities are met, and the universality of the lower body 12 is improved.

Further, referring to fig. 14, the supporting heat exchanging portion 31 is located at the inner top of the lower body 12, the bottom surface of the catalytic burner 2 is supported on the supporting heat exchanging portion 31, the top surface of the catalytic burner 2 is adapted to be limited by the limiting heat exchanging portion 32 located above the catalytic burner 2, and the side surface of the catalytic burner 2 is adapted to be limited by the limiting heat exchanging portion 32 located at the side of the catalytic burner 2, so as to prevent the catalytic burner 2 from shaking inside the heat exchanger 1 to damage the catalytic burner 2 itself or to crash the heat exchanger 1.

Specifically, referring to fig. 14, the limit heat exchanging part 32 may include: the top limit heat exchange portion 321 and the side limit heat exchange portion 322, the top limit heat exchange portion 321 is located at the top of the catalytic combustor 2 and carries out top limit on the catalytic combustor 2, the side limit heat exchange portion 322 is located on the side of the catalytic combustor 2 and carries out side limit on the catalytic combustor 2, and therefore accurate positioning of the catalytic combustor 2 in the installation space 4 is achieved, and the catalytic combustor 2 is prevented from shaking.

Referring to fig. 13 to 14, when the catalytic combustor 2 is installed, the catalytic combustor 2 is first placed in the installation space 4 of the lower body 12, the catalytic combustor 2 is preliminarily fixed by the support of the support heat exchanging portion 31 and the limit of the side limit heat exchanging portion 322, the upper body 11 is then assembled and fixed with the lower body 12, and the catalytic combustor 2 is clamped by the top limit heat exchanging portion 321, so that the catalytic combustor 2 is fixed in the installation space 4. Adopt the utility model discloses a burning heat transfer subassembly 10 can provide a catalytic combustor 2's mounting structure, does not influence the heat transfer function of burning heat transfer subassembly 10 again.

Further, the upper body 11 is configured as an upper heat exchanger, and the lower body 12 is configured as a lower heat exchanger, the top limit heat exchanging portion 321 being a part of the upper body 11, and the side limit heat exchanging portion 322 and the support heat exchanging portion 31 being a part of the lower body 12. When the upper body 11 is separated from the lower body 12, the catalytic combustor 2 can be mounted or dismounted.

Specifically, referring to fig. 14, the supporting heat exchanging portion 31 is divided into a middle group supporting heat exchanging portion 311, a first side group supporting heat exchanging portion 312, and a second side group supporting heat exchanging portion 313, the middle group supporting heat exchanging portion 311 is supported at a middle region of the bottom surface of the catalytic combustor 2, the first side group supporting heat exchanging portion 312 is supported at a boundary between the bottom surface and the first side surface of the catalytic combustor 2, and the second side group supporting heat exchanging portion 313 is supported at a boundary between the bottom surface and the second side surface of the catalytic combustor 2. The middle group supporting heat exchanging portion 311, the first side group supporting heat exchanging portion 312, and the second side group supporting heat exchanging portion 313 are distributed at intervals, which is beneficial to improving the stability of the supporting heat exchanging portion 31 to the catalytic combustor 2.

Further, the left side limiting heat exchanging part 322 is limited at a first side surface (i.e., the left side surface in fig. 14) of the catalytic combustor 2, the right side limiting heat exchanging part 322 is limited at a second side surface (i.e., the right side surface in fig. 14) of the catalytic combustor 2, and the left and right side limiting heat exchanging parts 322 respectively extend along the length direction of the catalytic combustor 2, so that the catalytic combustor 2 is completely limited in the length direction of the catalytic combustor 2.

Alternatively, the side heat exchanging part 322 has a larger cross-sectional size than the supporting heat exchanging part 31, thereby ensuring that the flow of water in the side heat exchanging part 322 is large, so that the excessive combustion heat of the catalytic combustor 2 can be taken away more when the water passes through the side heat exchanging part 322. In other embodiments, not shown, the heat exchanging part 322 may have the same cross-sectional size as the supporting heat exchanging part 31, or the supporting heat exchanging part 31 may have a smaller cross-sectional size than the heat exchanging part 322.

As shown in fig. 14, the cross section of the lateral limiting heat exchanging portion 322 is an ellipse, the major axis of the lateral limiting heat exchanging portion is parallel to the side surface of the catalytic combustor 2, and the dimension of the major axis is equal to or slightly smaller than the thickness of the catalytic combustor 2, so that the contact area between the lateral limiting heat exchanging portion 322 and the catalytic combustor 2 can be increased, the positioning reliability of the lateral limiting heat exchanging portion 322 on the catalytic combustor 2 can be improved, and the cooling effect of the lateral limiting heat exchanging portion 322 on the catalytic combustor 2 can be improved.

The side limiting heat exchanging part 322 is arranged at the side of the catalytic combustor 2, and most of the energy radiated from the catalytic combustor 2 passes upward through the upper body 11, and only a small part of the energy is radiated to the side limiting heat exchanging part 322, so that the temperature of water in the channel of the side limiting heat exchanging part 322 is significantly lower than that of water in the side heat exchanging part.

Specifically, in the combustion stage of the catalytic combustor 2, the temperature of the catalytic combustor 2 will be higher and higher, so that the temperature of the catalytic combustor 2 exceeds the suitable working temperature range, and at this time, because the temperature of water in the channel of the lateral limiting heat exchanging part 322 is lower than the temperature of the catalytic combustor 2, under the effect of heat transfer, the lateral limiting heat exchanging part 322 can cool the catalytic combustor 2, so that the catalytic combustor 2 is restored to the optimum working temperature range again, and the generation of harmful gas is reduced.

When the user need not use hot water, catalytic combustor 2 stops work temporarily, the spacing heat transfer portion of lateral part 322 continues to cool down catalytic combustor 2, effectively reduce catalytic combustor 2's inside temperature, make the heat accumulation of cutting off the water reduce, can the effective control temperature rise of cutting off the water, that is, can avoid in the stage of cutting off the water, catalytic combustor 2's high temperature waste heat lasts to heat the water in the heat transfer portion, and the temperature that leads to the delivery port lasts the rising, also can avoid catalytic combustor 2 to last overheated and influence catalytic combustor 2's life simultaneously.

In some alternative embodiments, the cross section of the supporting heat exchanging part 31 is elliptical and the major axis is parallel to the bottom surface of the catalytic combustor 2, thereby facilitating to increase the supporting area and enhance the supporting strength; or in the embodiment of fig. 14, the cross-section of the supporting heat exchanging part 31 is elliptical and the minor axis is parallel to the bottom surface of the catalytic combustor 2. The plurality of supporting heat exchanging portions 31 are supported on the bottom surface of the catalytic combustor 2 at intervals, which is beneficial to improving the stability of the supporting heat exchanging portions 31 to the catalytic combustor 2.

A common lower heat exchanging portion 332 is further disposed directly below the first side group supporting heat exchanging portion 312 and directly below the second side group supporting heat exchanging portion 313, the common lower heat exchanging portion 332, the first side group supporting heat exchanging portion 312, the second side group supporting heat exchanging portion 313 and the middle group supporting heat exchanging portion 311 are surrounded to form a lower space 34 with a downward opening, the lower space 34 is suitable for being configured as a lower combustion space, a preheating burner can be disposed in the lower combustion space to preliminarily heat the catalytic burner 2, so that the catalytic burner 2 reaches a suitable working temperature, when the air-gas mixture is combusted in the catalytic burner 2, the combustion is sufficient, and harmful gas amounts such as CO, NOx and the like generated due to insufficient combustion are greatly reduced.

The top limit heat exchanging part 321 is divided into a first side group top limit heat exchanging part 3211 and a second side group top limit heat exchanging part 3212, the first side group top limit heat exchanging part 3211 is limited at the junction of the top surface and the first side surface of the catalytic combustor 2, and the second side group top limit heat exchanging part 3212 is limited at the junction of the top surface and the second side surface of the catalytic combustor 2. Spacing heat transfer portion 3211 in first side group top and the spacing heat transfer portion 3212 in second side group top set apart the setting, are favorable to promoting the spacing effect of heat transfer portion 321 to catalytic combustor 2 in top.

Further, as shown in fig. 14, the top of the catalytic combustor 2 extends into the upper body 11, and the top limit heat exchanging portion 321 is located at the inner bottom of the upper body 11.

The top limit heat exchanging part 321 is provided with a common upper heat exchanging part 331 above, and the first side group top limit heat exchanging part 3211 and the second side group top limit heat exchanging part 3212 which are spaced apart from each other and the common upper heat exchanging part 331 above enclose an upper space 35 which is open downwards and is just opposite to the catalytic combustor 2. The heat of the catalytic burner 2 reaches the heat exchanger 1 after being buffered in the upper space 35, so that the heat exchanger 1 is prevented from being directly contacted with the catalytic burner 2 to influence the combustion effect of the catalytic burner 2.

In some embodiments, not shown, the cross-sections of the heat exchanging parts 3 may be circular, and the cross-sectional areas of the circular cross-sections may be equal or different.

Optionally, referring to the embodiment shown in fig. 15, the upper body 11 and the lower body 12 both have independent water inlet 36 and water outlet 37, so as to form a parallel structure, and in cooperation with a water volume server, the water flow in the upper body 11 and the lower body 12 can be independently controlled, so as to meet different heat exchange volume requirements.

Or referring to the embodiment shown in fig. 16, one of the upper body 11 and the lower body 12 is provided with a water inlet 36 and the other is provided with a water outlet 37, and the upper body 11 and the lower body 12 are communicated by an intermediate connection pipe 39, thereby forming a serial structure. In other words, when the upper body 11 and the lower body 12 are connected in series, the water flows in from the water inlet 36 of the lower body 12, enters the upper body 11 through the intermediate connection pipe 39, and finally flows out from the water outlet 37 of the upper body 11. The utility model discloses a burning heat exchange assemblies 10 provides parallelly connected, two kinds of water route connection's of establishing ties possibility, can select suitable water route connection mode according to the product needs, is superior to the single series connection water route mode of current heat exchanger.

Each of the upper body 11 and the lower body 12 has a peripheral enclosing plate 38, a heat exchanging portion 3 is provided inside the peripheral enclosing plate 38, and the heat exchanging portion 3 is a heat exchanging pipe. The surrounding enclosing plate 38 can protect the heat exchanging part 3 and the catalytic combustor 2.

Specifically, as shown in fig. 17 to 18, the peripheral wall 38 of the upper body 11 includes an upper front plate 113, an upper rear plate 114, an upper left plate 115, and an upper right plate 116, an upper left inner plate 117, and an upper right inner plate 118 are provided between the upper left plate 115 and the upper right plate 116, and the heat exchanging portion 3 of the upper body 11 is provided between the upper left inner plate 117, and the upper right inner plate 118. The upper left inner plate 117 and the upper right inner plate 118 are provided with heat exchange holes 13, the surface of the upper left plate 115 facing the upper left inner plate 117 and the surface of the upper right plate 116 facing the upper right inner plate 118 are provided with heat exchange convex hulls 14 corresponding to the heat exchange holes 13, water entering the upper body 11 from the water inlet 36 enters the heat exchange convex hulls 14 firstly, then enters the heat exchange holes 13 from the heat exchange convex hulls 14, and then enters the heat exchange parts 3 corresponding to the heat exchange holes 13. The heat exchange fins 112 are provided on the heat exchange portion 3 of the upper body 11.

Referring to fig. 19 to 20, the peripheral wall 38 of the upper body 11 includes a lower front plate 123, a lower rear plate 124, a lower left plate 125, and a lower right plate 126, a lower left inner plate 127 and a lower right inner plate 128 are provided between the lower left plate 125 and the lower right plate 126, and the heat exchanging portion 3 of the upper body 11 is provided between the lower left inner plate 127 and the lower right inner plate 128. The lower left inner plate 127 and the lower right inner plate 128 are provided with heat exchange holes 13, the surface of the lower left plate 125 facing the lower left inner plate 127 and the surface of the lower right plate 126 facing the lower right inner plate 128 are provided with heat exchange convex hulls 14 corresponding to the heat exchange holes 13, water entering the upper body 11 from the water inlet 36 enters the heat exchange convex hulls 14 firstly, then enters the heat exchange holes 13 from the heat exchange convex hulls 14, and then enters the heat exchange parts 3 corresponding to the heat exchange holes 13.

Optionally, the upper left inner plate 117 is welded to the upper left plate 115, the upper right inner plate 118 is welded to the upper right plate 116, the lower left inner plate 127 is welded to the lower left plate 125, the lower right inner plate 128 is welded to the lower right plate 126, and a water channel is formed between the heat exchange convex hull 14 and the corresponding heat exchange hole 13 and is communicated with the heat exchange portion 3.

Lower body flanges 121 are arranged on the lower front plate 123 and the lower rear plate 124, upper body flanges 111 are arranged on the upper front plate 113 and the upper rear plate 114, as shown in fig. 12 and 14, when the upper body 11 is buckled with the lower body 12, the upper body flanges 111 at the bottom of the upper body 11 are suitable for being attached to the lower body flanges 121 at the top of the lower body 12, and the upper body flanges 111 and the lower body flanges 121 can be fixed by using bolt fasteners, so that the upper body 11 and the lower body 12 can be fixed.

The lower front plate 123 is also provided with an observation window 122 for facilitating observation of the combustion condition in the lower combustion space.

Alternatively, the preheating burner 7 is a honeycomb ceramic burner, the catalytic burner 2 is a ceramic foam burner, and a catalyst is coated on the ceramic foam burner. When the preheating burner 7 radiatively heats the catalytic burner 2, the catalyst can be activated, so that the gas at the catalytic burner 2 is sufficiently combusted, and harmful gas generated due to insufficient combustion is reduced.

The preheating burner 7 can be an open flame burner, and a spacing is provided between the preheating burner 7 and the catalytic burner 2, which spacing can prevent the preheating burner 7 from flashback, i.e. the spacing serves to prevent the flames of the open flame from flashback.

Alternatively, the set pitch may range from 5mm to 80mm, for example, the set pitch may be 20mm, 30mm or 50 mm.

Referring to fig. 6, a water inlet valve 911 is disposed on the cold water inlet pipe 91, a bypass pipeline 95 is connected between the cold water inlet pipe 91 and the hot water outlet pipe 92, a bypass valve 951 is disposed on the bypass pipeline 95, the other end of the bypass pipeline 95 is connected to the cold water inlet pipe 91 through a cold water three-way pipe 961, the other end of the bypass pipeline 95 is connected to the hot water outlet pipe 92 through a hot water three-way pipe 962, and the bypass pipeline 95 can lead a part of cold water to the hot water outlet pipe 92 to prevent the water flowing out of the hot water outlet pipe 92 from being over-.

The water inlet valve 911 and the bypass valve 951 are both connected with the water main 99, so that the amount of cold water in the cold water inlet pipe 91 can be independently adjusted through the water inlet valve 911, and the amount of cold water in the bypass pipeline 95 can be independently adjusted through the bypass valve 951, namely the amount of cold water in the cold water inlet pipe 91 and the amount of cold water in the bypass pipeline 95 are not influenced mutually, and the accurate control of the water temperature is facilitated.

The top of the combustion heat exchange assembly 10 is a smoke exhaust hood 97, tail gas of the catalytic combustor 2 and the preheating combustor 7 is exhausted to the outside of the gas water heater 100 through the smoke exhaust hood 97, and the combustion heat exchange assembly 10 is connected with a controller 98 so as to ensure that the temperature of water flowing out of the hot water outlet pipe 92 meets the requirements of users.

According to another aspect of the present invention, a gas water heater 100 includes the combustion heat exchange assembly 10 of the above embodiment.

According to the utility model discloses hanging stove of third aspect embodiment, including the burning heat exchange assembly 10 of above-mentioned embodiment.

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, 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 without departing from the scope of the present invention.

Claims (26)

1. A combustion heat exchange assembly, comprising:

the heat exchanger is internally provided with a heat exchange part and is connected with a cold water inlet pipe and a hot water outlet pipe;

a catalytic burner disposed inside the heat exchanger, and at least a portion of the heat exchanging portion is located above the catalytic burner;

a preheating burner disposed opposite the catalytic burner, the preheating burner for heating the catalytic burner;

the preheating burner is arranged on the air outlet side of the premixing cavity.

2. The combustion heat exchange assembly of claim 1, wherein the premix chamber comprises:

a cavity having an air inlet side and an air outlet side;

at least one level of air distribution plate, the at least one level of air distribution plate is configured in the cavity, and the at least one level of air distribution plate separates the air inlet side and the air outlet side.

3. The combustion heat exchange assembly of claim 2, wherein the at least one stage of air distribution plate comprises: the air distribution plate comprises a first-stage air distribution plate and a second-stage air distribution plate, wherein the first-stage air distribution plate is close to the air inlet side, and the second-stage air distribution plate is close to the air outlet side.

4. The combustion heat exchange assembly of claim 2, wherein the at least one air distribution plate is a plurality of stages of air distribution plates, the plurality of stages of air distribution plates are arranged in the cavity at intervals, so that air and fuel gas entering the cavity from the air inlet side sequentially pass through the plurality of stages of air distribution plates and then are discharged into the heat exchanger from the air outlet side, and the air distribution plates are used for mixing the fuel gas and the air.

5. The combustion heat exchange assembly of claim 3, wherein the primary air distribution plate has a flow splitting guide structure for splitting and guiding the air and the fuel gas entering the cavity from the air inlet side.

6. The combustion heat exchange assembly of claim 5, wherein the cavity comprises: the gas-liquid separation device comprises a cavity body and an inlet part, wherein the inlet part is arranged on the cavity body, the inlet part is constructed to be at the gas inlet side, the inlet part is provided with an air inlet and a gas inlet, and the air inlet is opposite to the flow-dividing guide structure.

7. The combustion heat exchange assembly of claim 5, wherein the primary air distribution plate comprises: the first section and the second section are positioned on two sides of the flow dividing guide structure, and the flow dividing guide structure is opposite to the first section and the second section and protrudes towards the air inlet side.

8. The combustion heat exchange assembly of claim 7, wherein the split flow guide structure comprises: the first inclined plane section is connected with the first section, and the second inclined plane section is connected with the second section.

9. The combustion heat exchange assembly of claim 7, wherein the flow dividing guide structure, the first section and the second section are all provided with primary air distribution small holes, the first section and the second section are also provided with primary air distribution big holes, and the secondary air distribution plate is uniformly provided with secondary air distribution holes.

10. The combustion heat exchange assembly of claim 1 wherein the heat exchanger is internally provided with a burner retaining structure and the catalytic burner is retained by the burner retaining structure.

11. The combustion heat exchange assembly of claim 10 wherein the burner retaining structures are disposed on either side of the catalytic burner, respectively, and the burner retaining structures on each side grip the catalytic burner.

12. The combustion heat exchange assembly of claim 10, wherein the burner retention structure comprises: a clamping groove in which a portion of the catalytic combustor is fitted.

13. The combustion heat exchange assembly of claim 12 wherein the clamping groove forms a clamping fit with the catalytic combustor on at least two sides.

14. The combustion heat exchange assembly of claim 10 wherein the burner retention structure is a pair of spaced apart "U" shaped structures with openings facing each other.

15. The combustion heat exchange assembly of claim 10, wherein the heat exchanger comprises: the combustor comprises peripheral enclosing plates and the heat exchanging part arranged in the peripheral enclosing plates, and the combustor holding structure is arranged on two opposite inner wall surfaces of the peripheral enclosing plates.

16. The combustion heat exchange assembly of claim 10 wherein the burner retaining structure has a passage therein communicating with a heat exchange medium passage in the heat exchanger.

17. The combustion heat exchange assembly of claim 16, wherein the heat exchanger has a water inlet in communication with the cold water inlet tube and a water outlet in communication with the hot water outlet tube, the channel within the burner retaining structure being closer to the water inlet than the water outlet.

18. The combustion heat exchange assembly of claim 10, wherein an installation space is formed in the heat exchanger, and the heat exchange portion includes: the catalytic combustor comprises a supporting heat exchange part and a limiting heat exchange part, wherein the supporting heat exchange part and the limiting heat exchange part are the combustor holding structure, the supporting heat exchange part is used for supporting the catalytic combustor, and the limiting heat exchange part is used for limiting the catalytic combustor in the installation space.

19. The combustion heat exchange assembly of claim 18, wherein the heat exchanger is a split structure and comprises: the catalytic combustor is arranged at the joint of the split upper body and the split lower body, and the catalytic combustor is hidden inside the upper body and the lower body.

20. The combustion heat exchange assembly of claim 19, wherein the heat transfer portion comprises: the catalytic combustor comprises a top limit heat exchange part and a side limit heat exchange part, wherein the top limit heat exchange part is positioned at the top of the catalytic combustor and is used for limiting the top of the catalytic combustor, and the side limit heat exchange part is positioned on the side surface of the catalytic combustor and is used for limiting the catalytic combustor in the lateral direction.

21. The combustion heat exchange assembly of claim 20 wherein the upper body is configured as an upper heat exchanger and the lower body is configured as a lower heat exchanger, the top-limiting heat exchange portion being part of the upper body, the side-limiting heat exchange portion and the support heat exchange portion being part of the lower body.

22. The combustion heat exchange assembly of claim 1, wherein the preheat burner is a honeycomb ceramic burner.

23. The combustion heat exchange assembly of claim 1 wherein the catalytic combustor is a ceramic foam combustor having a catalyst coated thereon.

24. The combustion heat exchange assembly of claim 1, wherein a water inlet valve is arranged on the cold water inlet pipe, a bypass pipeline is connected between the cold water inlet pipe and the hot water outlet pipe, a bypass valve is arranged on the bypass pipeline, and the water inlet valve and the bypass valve are both connected with a main water pipe.

25. A gas water heater comprising a combustion heat exchange assembly according to any one of claims 1-24.

26. A wall hanging stove comprising a combustion heat exchange assembly according to any one of claims 1 to 24.

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