CN111692750A - Combustion heat exchange assembly and gas combustion equipment with same - Google Patents

Abstract

The invention discloses a combustion heat exchange assembly and gas combustion equipment with the same. This burning heat transfer subassembly includes: a heat exchanger; a burner retention structure disposed inside the heat exchanger; a burner located inside the heat exchanger and retained by the burner retaining structure. According to the combustion heat exchange assembly, due to the arrangement of the combustor holding structure, the combustor can be correctly positioned in the heat exchanger, and the combustor is prevented from shaking in the heat exchanger to damage the combustor or crash the heat exchanger. In addition, the combustor is embedded into the heat exchanger, a connecting fastener between the combustor and the heat exchanger is eliminated, the structure of the combustion heat exchange assembly is more compact, and the weight of the combustion heat exchange assembly is favorably reduced.

Description

Combustion heat exchange assembly and gas combustion equipment with same

Technical Field

The invention relates to the technical field of water heaters, in particular to a combustion heat exchange assembly and gas combustion equipment with the same.

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.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the invention provides a combustion heat exchange assembly, and a combustor is integrated in a heat exchanger.

The invention also provides gas combustion equipment with the combustion heat exchange assembly.

The combustion heat exchange assembly according to the embodiment of the invention comprises: a heat exchanger; a burner retention structure disposed inside the heat exchanger; a burner located inside the heat exchanger and retained by the burner retaining structure.

According to the combustion heat exchange assembly provided by the embodiment of the invention, the combustor holding structure is arranged, so that the combustor can be correctly positioned in the heat exchanger, and the combustor is prevented from shaking in the heat exchanger to cause damage to the combustor or damage to the heat exchanger. In addition, the combustor is embedded into the heat exchanger, a connecting fastener between the combustor and the heat exchanger is eliminated, the structure of the combustion heat exchange assembly is more compact, and the weight of the combustion heat exchange assembly is favorably reduced.

According to some embodiments of the invention, the burner holding structures are arranged on both sides of the burner, respectively.

Further, the burner retaining structure of each side clamps the burner.

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

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

Specifically, the burner holding structure includes: the burner comprises an upper wall, a lower wall and a connecting wall connected between the outer sides of the upper wall and the lower wall, wherein the upper wall, the connecting wall and the lower wall surround a clamping groove with an opening facing the burner, and the clamping groove and the burner form clamping fit on three 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.

According to some embodiments of the invention, a buffer structure is provided between the burner holding structure and the burner.

According to some embodiments of the invention, the heat exchanger comprises: the combustor comprises peripheral enclosing plates and heat exchange parts arranged in the peripheral enclosing plates, wherein the combustor holding structure is fixed on two opposite inner wall surfaces of the peripheral enclosing plates.

According to some embodiments of the invention, the burner holding structure is a pair of "L" shaped structures and comprises a first limb and a second limb, the first limbs being opposite each other, the second limb being connected at the bottom of the first limb and the second limbs supporting the burner.

According to some embodiments of the present invention, the burner holding structure is at least two sets of heat exchanging portions, each set of the heat exchanging portions including two heat exchanging pipes sandwiching the burner up and down.

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.

According to some embodiments of the invention, the heat exchanger is provided with at least one row of heat exchange pipes above the burner, the heat exchange pipes are arranged opposite to the burner, and the heat exchange pipes are provided with heat exchange fins.

According to some embodiments of the invention, the heat exchanger has at least one row of heat exchange tubes on a side wall enclosure below the burner.

Optionally, the heat exchanger is a stainless steel material.

Optionally, the burner is a catalytic burner, and a preheating burner is arranged inside the heat exchanger opposite to the catalytic burner.

Furthermore, at least one row of heat exchange pipelines are arranged on the side wall of the heat exchanger, opposite to the side plate of the preheating burner.

According to another aspect of the invention, the gas combustion equipment comprises the combustion heat exchange assembly, and is a gas water heater or a wall-mounted furnace.

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.

Reference numerals:

the burner comprises a combustion heat exchange assembly 10, a heat exchanger 1, a heat exchanger flange 1110, heat exchange fins 112, a front plate 1130, a rear plate 1140, a left plate 1150, a right plate 1160, a right plate through hole 1161, a left inner plate 1170, a right inner plate 1180, a right inner plate through hole 1181, an observation window 122, a heat exchange hole 13, a heat exchange convex hull 14, a burner 2, a heat exchange part 3, a supporting heat exchange part 31, a top limiting heat exchange part 321, a side limiting heat exchange part 322, an upper heat exchange part 331, a lower heat exchange part 332, a water inlet 36, a water outlet 37, a peripheral enclosing plate 38, a burner holding structure 5, an upper wall 51, a connecting wall 52, a lower wall 53, a clamping groove 54, a premixing cavity 6, an air inlet 6111, a gas inlet 6112, an outer flange 614, an air distribution plate 6230, a preheating burner 7, a mounting bracket 8 and a mounting hole 81.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

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," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The combustion heat exchange assembly 10 according to an embodiment of the present invention is described in detail below with reference to fig. 1-4.

Referring to fig. 1, a combustion heat exchange assembly 10 according to an embodiment of the present invention includes: a heat exchanger 1, a burner holding structure 5, a burner 2, and a preheating burner 7, wherein the heat exchanger 1 has a heat exchanging portion 3 therein, the burner 2 is disposed inside the heat exchanger 1, and at least a part of the heat exchanging portion 3 (i.e., an upper heat exchanging portion 331 mentioned below) is located above the burner 2.

The preheating burner 7 can be arranged inside the heat exchanger 1, the preheating burner 7 being arranged opposite the burner 2, for example in the example of fig. 3, the preheating burner 7 being located below the burner 2, the preheating burner 7 at least serving to heat the burner 2. In some embodiments, not shown, the preheating burner 7 may be located above or to the side of the burner 2, provided that the burner 2 is located on the downstream side of the preheating burner 7 in the flow direction of the gas stream. Of course, the preheating burner 7 can also be arranged outside the heat exchanger 1.

For convenience of description, the preheating burner 7 is illustrated below the burner 2, but should not be construed as limiting the relative position of the preheating burner 7 and the burner 2. When the combustion heat exchange assembly 10 works, the heat radiated by the preheating burner 7 upwards reaches the burner 2 to heat the burner 2, so that the temperature of the burner 2 is increased to a proper working temperature range, the 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 burner 2, the combustion is sufficient, so that the quantity 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 preheating burner 7 is an open flame burner, optionally the preheating burner 7 is a honeycomb ceramic burner, the burner 2 is a catalytic burner, optionally the burner 2 is a catalyst coated ceramic foam burner.

Optionally, in order to avoid the backfire phenomenon of the preheating burner 7, a space is set between the preheating burner 7 and the burner 2, and the set space is used for preventing the backfire of the flame burning in the open flame.

Combustor retaining structure 5 sets up in the inside of heat exchanger 1, and combustor retaining structure 5 is used for keeping combustor 2, makes combustor 2 correctly fix a position in the inside of heat exchanger 1, prevents that combustor 2 from rocking and leading to combustor 2 self to damage or hit heat exchanger 1 inside heat exchanger 1.

According to the combustion heat exchange assembly provided by the embodiment of the invention, the combustor holding structure 5 is arranged, so that the combustor 2 can be correctly positioned in the heat exchanger 1, and the combustor 2 is prevented from shaking in the heat exchanger 1 to cause the combustor 2 to damage or crash the heat exchanger 1. In addition, the combustor 2 is embedded in the heat exchanger 1, and a connecting fastener between the combustor 2 and the heat exchanger 1 is eliminated, 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.

Further, the burner holding structures 5 are respectively arranged on both sides of the burner 2, and after the assembly is completed, the position of the burner holding structures 5 in the heat exchanger 1 is fixed, so that the burner holding structures 5 can position the burner 2 more reliably.

Specifically, the burner holding structure 5 includes: and a holding groove 54 in which a portion of the burner 2 is fitted, the holding groove 54 applying a clamping force to the burner 2 to prevent the burner 2 from shaking.

Further, the clamping groove 54 and the burner 2 form a clamping fit on at least two sides, ensuring a good clamping effect.

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 burner 2, the clamping groove 54 forming a clamping fit with the 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 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 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 much clamping force to damage the 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 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.

The burner holding structure 5 is at least two sets of heat exchanging portions 3, each set of heat exchanging portions 3 including two heat exchanging pipes sandwiching the burner 2 from above and below. In the embodiment shown in fig. 5, the heat exchanging portion 3 includes: the supporting heat exchanging part 31 positioned at the lower part of the combustor 2 and the top limit heat exchanging part 321 positioned at the top part of the heat exchanger 2 further comprise side limit heat exchanging parts 322 positioned at the side parts of the heat exchanger 2, and the supporting heat exchanging part 31, the top limit heat exchanging part 321 and the side limit heat exchanging parts 322 can fix the combustor 2 without using extra connecting parts, so that the number of parts is reduced, and the total weight of the combustion heat exchange assembly 10 is reduced.

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 burner 2. The water flow can circulate in the channel and the heat exchange medium channel, and after being heated by the burner 2, the water flow is discharged from the water outlet 37 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, and the channel in the burner holding structure 5 is closer to the water inlet 36 than to 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 burner 2.

The burner holding structure 5 is arranged at the side of the burner 2, and the energy radiated by the 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, during the combustion phase of the burner 2, the temperature of the burner 2 will be higher and higher, so that the temperature of the burner 2 exceeds the proper working temperature range, at this time, because the temperature of the water in the channel of the burner holding structure 5 is lower than the temperature of the burner 2, the burner holding structure 5 can cool the burner 2 under the effect of heat transfer, so that the burner 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, combustor 2 stops work temporarily, combustor retaining structure 5 continues to cool down combustor 2, effectively reduces the inside temperature of combustor 2, 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, the high temperature waste heat of combustor 2 lasts heats the water in heat transfer portion 3, and the temperature that leads to delivery port 37 lasts the rising, also can avoid combustor 2 to last overheated and influence combustor 2's life simultaneously.

The heat exchanger 1 includes: the burner comprises a peripheral enclosing plate 38 and a heat exchange part 3 arranged in the peripheral enclosing plate 38, wherein a burner holding structure 5 is fixed on two opposite inner wall surfaces of the peripheral enclosing plate 38.

Specifically, referring to fig. 1 to 2 and 4, the heat exchanging part 3 includes: the combustor comprises an upper heat exchanging part 331 and a lower heat exchanging part 332, wherein the upper heat exchanging part 331 is located at the inner top of the surrounding enclosing plate 38, the lower heat exchanging part 332 is located at the inner bottom of the surrounding enclosing plate 38, the combustor 2 is located in the middle area of the surrounding enclosing plate 38, and the preheating combustor 7 is located at the bottom of the surrounding enclosing plate 38. The upper heat exchanging portion 331 is provided at the upper portion of the burner holding structure 5, the lower heat exchanging portion 332 is provided at the 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 structure 5 and the 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 burner 2 can fully heat the water in the upper heat exchanging portion 331, and the water temperature can be guaranteed 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 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 burner 2 can be increased, the clamping reliability of the burner holding structure 5 to the 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, the redundant combustion heat of the burner 2 can be taken away more, and the cooling effect of the burner holding structure 5 to the burner 2 is improved.

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

The heat exchanger flanges 1110 are arranged on the lower portions of the front plate 1130 and the rear plate 1140, and the heat exchanger flanges 1110 are fixed with the outer flanges 614 of the premix chamber 6 through fasteners, so that the heat exchanger 1 is assembled with the premix chamber 6.

The premixing cavity 6 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, and the air inlet 6111 and the fuel gas inlet 6112 are separated, so that the air inflow of the air and the fuel gas can be independently adjusted, the ratio of the air and the fuel gas can be adjusted, and the combustion requirement can be met. The air inlet 6111 is located on the bottom surface of the premixing cavity 6, the gas inlet 6112 is located on the outer wall of the side surface of the premixing cavity 6, 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.

Premixing chamber 6 can realize premixing to air and gas to premixing chamber 6 is equipped with air distribution plate 6230, and air distribution plate 6230 can mix air and gas once more, 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 at the combustion stage.

The air inlet 6111 and the gas inlet 6112 are arranged below the air distribution plate 6230, the air outlet side of the premixing cavity 6 is arranged above the air distribution plate 6230, and the uniformly mixed air-gas mixture flows out from the air outlet side and then sequentially passes through the preheating burner 7 and the burner 2.

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

The surfaces of the front and rear plates 1130, 1140 facing each other are provided with receiving grooves and the burner holding structure 5 is arranged in the receiving grooves of the front and rear plates 1130, 1140, whereby the positioning of the burner holding structure 5 in the heat exchanger 1 is achieved.

Referring to fig. 1 and 4, the water inlet 36 and the water outlet 37 are both disposed on the right plate 1160, water from a water source enters the corresponding heat exchange convex hull 14 on the right plate 1160 through the water inlet 36, flows into the heat exchange medium channel of one of the lower heat exchange portions 332 from the heat exchange hole 13 opposite to the heat exchange convex hull 14, then continuously flows leftwards into the corresponding heat exchange convex hull 14 on the left plate 1150, flows into the heat exchange medium channel of the other lower heat exchange portion 332 from the heat exchange convex hull 14, flows through all the lower heat exchange portions 332, then enters the heat exchange convex hull 14 corresponding to the upper heat exchange portion 331, flows through all the upper heat exchange portions 331, and finally flows out from the water outlet 37 on the right plate 1160.

Of course, the water inlet 36 and the water outlet 37 may be disposed on any of the different plates of the peripheral wall 38, for example, in some embodiments not shown, the water outlet 37 may also be disposed on the left plate 1150.

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 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 combustor 2 through the right plate through hole 1161 and the right inner plate through hole 1181, and the temperature of the combustor 2 can be monitored more accurately.

The heat exchanger 1 is provided with at least one row of heat exchange pipes 3 (for example, an upper heat exchange portion 331 in fig. 2) above the burner 2, the heat exchange pipes 3 are arranged opposite to the burner 2, and the radiant heat of the burner 2 directly reaches the heat exchange pipes 3. The heat exchange pipe 3 is provided with the heat exchange fins 112, which is beneficial to increasing the heat exchange area and improving the heat exchange efficiency.

The heat exchanger 1 has at least one row of heat exchange tubes 3 (e.g., the lower heat exchange portion 332 in fig. 2) on a side wall enclosure below the burner 2.

Optionally, the burner is a catalytic burner, and a preheating burner is arranged inside the heat exchanger opposite to the catalytic burner.

Furthermore, at least one row of heat exchange pipes is arranged on the side wall of the heat exchanger 1 opposite to the side plate of the preheating burner 7, and the preheating burner 7 can perform primary heat exchange on cold water entering the part of the heat exchange pipes.

That is, the heat exchange tubes of the heat exchanger 1 extend from above the preheating burner 7 to above the catalytic burner 2. The heat exchange pipeline below the catalytic combustor 2 is used for exchanging heat generated by preheating combustion into a water channel.

Since the catalytic combustion radiates heat outwards, i.e. there is heat generated at the bottom of the catalytic burner 2, the heat exchanger 1 of the present invention actually surrounds the catalytic burner 2.

According to another aspect of the present invention, a gas combustion device includes the combustion heat exchange assembly 10 of the above embodiment, and optionally, the gas combustion device is a gas water heater or a wall-hanging stove.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (18)

1. A combustion heat exchange assembly, comprising:

a heat exchanger;

a burner retention structure disposed inside the heat exchanger;

a burner located inside the heat exchanger and retained by the burner retaining structure.

2. The combustion heat exchange assembly of claim 1, wherein the burner retaining structures are disposed on either side of the burner, respectively.

3. The combustion heat exchange assembly of claim 2 wherein the burner retaining structure of each side grips the burner.

4. The combustion heat exchange assembly of claim 1, wherein the burner retention structure comprises: a clamping groove in which a portion of the burner is fitted.

5. The combustion heat exchange assembly of claim 4 wherein the clamping groove forms a clamping fit with the burner on at least two sides.

6. The combustion heat exchange assembly of claim 5, wherein the burner retention structure comprises: the burner comprises an upper wall, a lower wall and a connecting wall connected between the outer sides of the upper wall and the lower wall, wherein the upper wall, the connecting wall and the lower wall surround a clamping groove with an opening facing the burner, and the clamping groove and the burner form clamping fit on three sides.

7. The combustion heat exchange assembly of claim 1 wherein the burner retention structure is a pair of spaced apart "U" shaped structures with openings facing each other.

8. The combustion heat exchange assembly of claim 1, wherein a buffer structure is disposed between the burner retaining structure and the burner.

9. The combustion heat exchange assembly of claim 1, wherein the heat exchanger comprises: the combustor comprises peripheral enclosing plates and heat exchange parts arranged in the peripheral enclosing plates, wherein the combustor holding structure is fixed on two opposite inner wall surfaces of the peripheral enclosing plates.

10. The combustion heat exchange assembly of claim 1 wherein the burner retaining structure is a pair of "L" shaped structures and includes a first leg and a second leg, the first legs being opposite each other, the second leg being connected to a bottom of the first legs and the second legs supporting the burner.

11. The combustion heat exchange assembly of claim 1, wherein the burner holding structure is at least two sets of heat exchange portions, each set of the heat exchange portions including two heat exchange tubes sandwiching the burner up and down.

12. The combustion heat exchange assembly of claim 1, wherein the burner retaining structure has a passage therein, the passage communicating with a heat exchange medium passage in the heat exchanger.

13. The combustion heat exchange assembly of claim 1, wherein the heat exchanger is provided with at least one row of heat exchange tubes above the burner, the heat exchange tubes are arranged opposite to the burner, and the heat exchange tubes are provided with heat exchange fins.

14. The combustion heat exchange assembly of claim 1 or 13, wherein the heat exchanger has at least one row of heat exchange tubes on a side wall shroud below the burner.

15. The combustion heat exchange assembly of claim 1, wherein the heat exchanger is a stainless steel material.

16. The combustion heat exchange assembly of claim 1 wherein the burner is a catalytic burner and a preheat burner is disposed within the heat exchanger opposite the catalytic burner.

17. The combustion heat exchange assembly of claim 16, wherein at least one row of heat exchange tubes is disposed on the heat exchanger side wall at a position opposite to the side plate of the preheat burner.

18. A gas combustion device comprising a combustion heat exchange assembly according to any one of claims 1 to 17, wherein the gas combustion device is a gas water heater or a wall-hanging stove.

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