CN111692751A

CN111692751A - Combustion heat exchange assembly and gas water heater with same

Info

Publication number: CN111692751A
Application number: CN201910195021.6A
Authority: CN
Inventors: 寿利萍; 梁泽锋; 黄官贤; 李茂照; 梁国荣
Original assignee: Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2020-09-22

Abstract

The invention discloses a combustion heat exchange assembly and a gas water heater with the same. This burning heat transfer subassembly includes: the heat exchanger is internally provided with a heat exchanging part; a catalytic burner disposed inside the heat exchanger, and at least a portion of the heat exchanging portion is located above the catalytic burner; and at least a part of the heat exchange portion is positioned at the side part of the catalytic combustor, and the preheating combustor is at least used for heating the catalytic combustor. According to the combustion heat exchange assembly provided by the invention, the catalytic combustor is arranged in the heat exchanger, so that the combustion heat exchange assembly is compact and reliable in structure, the heat exchange parts are arranged above and at the side parts of the catalytic combustor, the heat radiation efficiency of the catalytic combustor to water flow in the heat exchange parts can be increased, and in addition, the heat exchange parts at the side parts can also play a role in cooling the catalytic combustor.

Description

Combustion heat exchange assembly and gas water heater with same

Technical Field

The invention relates to the technical field of water heaters, in particular to a combustion heat exchange assembly and a gas water heater 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, wherein a preheating burner is arranged below a catalytic burner and is used for heating the catalytic burner, so that the catalytic burner is ensured to work in a proper temperature range.

The invention also provides a gas water heater with the combustion heat exchange assembly.

The combustion heat exchange assembly according to the embodiment of the invention comprises: the heat exchanger is internally provided with a heat exchanging part; a catalytic burner disposed inside the heat exchanger, and at least a portion of the heat exchanging portion is located above the catalytic burner; and at least a portion of the heat exchange portion is located at a side portion of the catalytic combustor.

According to the combustion heat exchange assembly provided by the embodiment of the invention, the catalytic combustor is arranged in the heat exchanger, so that the combustion heat exchange assembly is compact and reliable in structure, the heat exchange parts are arranged above and at the side parts of the catalytic combustor, the heat radiation efficiency of the catalytic combustor to water flow in the heat exchange parts can be increased, and in addition, the heat exchange parts at the side parts can also play a role in cooling the catalytic combustor.

According to some embodiments of the invention, the combustion heat exchange assembly further comprises: the preheating burner is arranged opposite to the catalytic burner and at least used for heating the catalytic burner.

According to some embodiments of the invention, the combustion heat exchange assembly further comprises: the preheating burner is arranged on the catalytic burner, a set distance is arranged between the catalytic burner and the preheating burner, and the set distance ranges from 5mm to 80 mm.

Specifically, at least a part of the heat exchanging part is located between the set intervals of the catalytic combustor and the preheating combustor.

According to some embodiments of the invention, the combustion heat exchange assembly further comprises: a burner retaining structure disposed inside the heat exchanger for retaining the catalytic burner.

Further, the burner holding structures are respectively disposed at both sides of the catalytic burner.

Specifically, the burner holding structure includes: a clamping groove in which a portion of the burner is fitted.

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

Specifically, the burner holding structure includes: the upper wall, the connecting wall and the lower wall surround a clamping groove with an opening facing the catalytic combustor, and the clamping groove and the catalytic combustor form clamping fit on three sides.

Optionally, the burner retaining structure is a pair of spaced apart "U" shaped structures with openings facing each other.

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

Further, the heat exchanger has a water inlet and a water outlet, the channel within the burner retaining structure being closer to the water inlet than the water outlet.

Specifically, an upper heat exchange portion is arranged on the upper portion of the burner holding structure, a lower heat exchange portion is arranged on the lower portion of the burner holding structure, the lower heat exchange portion is connected with the water inlet, and the upper heat exchange portion is connected with the water outlet.

Further, at least a part of the upper heat exchange portions are positioned right above the burner holding structures and the catalytic burner, and the lower heat exchange portions are divided into two spaced groups and are respectively positioned right below the two burner holding structures.

According to some embodiments of the present invention, the water introduced into the heat exchanger from the water inlet passes through the lower heat exchanging part, the burner holding structure, and the upper heat exchanging part in this order, and the number of times of the water returning through the lower heat exchanging part is less than the number of times of the water returning through the upper heat exchanging part.

Optionally, the lower heat exchange portion is sparse compared to the upper heat exchange portion.

According to some embodiments of the present invention, a cross-sectional area of a cross-section of the burner holding structure is larger than a cross-sectional area of a cross-section of any one of the heat exchanging parts.

According to some embodiments of the invention, the heat exchanger comprises: bounding wall, upper portion heat transfer portion and lower part heat transfer portion all around, the upper portion heat transfer position in the inside top of bounding wall all around, the lower part heat transfer position in the interior bottom of bounding wall all around, the catalytic combustor is located the middle part region of bounding wall all around, the preheating combustor is located the bottom of bounding wall all around.

Further, the combustion heat exchange assembly further comprises: the mounting bracket is arranged on the surrounding enclosing plates and corresponds to the end part of the catalytic combustor, and mounting holes are formed in the mounting bracket.

Further, the mounting hole is used for mounting a thermocouple or a photoresistor.

Be provided with first installing support and second installing support on the bounding wall all around, first installing support with the tip position of catalytic combustor corresponds, the second installing support with the tip position of preheating combustor corresponds, first installing support with all be provided with temperature sensor and opto-coupler detector on the second installing support.

According to another aspect of the embodiment of the invention, the gas water heater comprises the combustion heat exchange assembly.

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 heat exchange device 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 catalytic combustor 2, a heat exchange part 3, a support heat exchange part 31, a top limit heat exchange part 321, a side limit 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 surrounding plate 38, a combustor 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 outward flange 614, an air distribution plate 6230, a preheating combustor 7, a mounting bracket 8 and a mounting hole.

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 to 5.

Referring to fig. 1-3, a combustion heat exchange assembly 10 according to an embodiment of the present invention may include: a heat exchanger 1, a catalytic combustor 2, and a preheating combustor 7, wherein the heat exchanger 1 has a heat exchanging portion 3 therein, the catalytic combustor 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 catalytic combustor 2, and further, at least a part of the heat exchanging portion 3 (e.g., a side limiting heat exchanging portion 322 in fig. 5) is located at a side portion of the catalytic combustor 2.

The top and the lateral part of catalytic combustor 2 all are provided with heat transfer portion 3, can increase the thermal radiation efficiency of 2 pairs of heat transfer portion 3 interior rivers of catalytic combustor, and in addition, the heat transfer portion of lateral part can also play the cooling effect to catalytic combustor 2.

As shown in fig. 5, a part of the heat exchanging part 3 (referred to as a side heat exchanging part for short) is disposed at the side of the catalytic combustor 2, and most of the energy radiated from the catalytic combustor 2 passes upward through the upper heat exchanging part 3 (referred to as an upper heat exchanging part for short) and only a small part of the energy is radiated to the side heat exchanging part, so that the temperature of water in the channel of the side heat exchanging part is significantly lower than that of water in the upper 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 an appropriate working temperature range, and at this time, because the temperature of water in the channel of the side heat exchange portion is lower than the temperature of the catalytic combustor 2, the side heat exchange portion can cool the catalytic combustor 2 under the action of heat transfer, 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 side heat transfer portion 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 effectively control the 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 to heating the water in the heat transfer portion of top, and lead to a water temperature to last to rise, also can avoid catalytic combustor 2 to last overheated and influence catalytic combustor 2's life simultaneously.

The preheating burner 7 can be arranged inside the heat exchanger 1 or outside the heat exchanger 1, the preheating burner 7 being arranged opposite the catalytic burner 2, for example in the example of fig. 3, the preheating burner 7 being located below the catalytic burner 2, the preheating burner 7 at least serving 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 catalytic burner 2 and the preheating burner 7 have a set spacing therebetween, optionally in the range of 5mm to 80mm, for example 20mm, 30mm or 50 mm.

The preheating burner 7 is an open flame burner, and a space is set between the preheating burner 7 and the catalytic burner 2 to prevent the preheating burner 7 from generating a backfire phenomenon, and the set space is used for preventing the backfire of the flame of the open flame.

At least a part of the heat exchanging part 3 (e.g., the lower heat exchanging part 332 in fig. 3) is located between the catalytic combustor 2 and the preheating combustor 7 at a set interval. In other words, the heat exchange portion 3, which is a heat exchange pipe for performing primary heat exchange on the cold water entering the heat exchange portion 3, is also provided in the region above the preheating burner 7 and below the catalytic burner 2.

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.

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

Alternatively, the preheating burner 7 is a honeycomb ceramic burner and the catalytic burner 2 is a catalyst-coated ceramic foam burner.

According to the combustion heat exchange assembly 10, the catalytic combustor 2 and the preheating combustor 7 are arranged inside the heat exchanger 1, so that the combustion heat exchange assembly 10 is compact and reliable in structure, the preheating combustor 7 can heat the catalytic combustor 2, the temperature of the catalytic combustor 2 is increased to a proper working temperature range, and excessive harmful gas caused by insufficient gas combustion is prevented.

Referring to fig. 2-4, the combustion heat exchange assembly 10 further includes: combustor retaining structure 5, combustor retaining structure 5 set up in the inside of heat exchanger 1, and combustor retaining structure 5 is used for keeping catalytic combustor 2, makes catalytic combustor 2 correctly fix a position in the inside of heat exchanger 1, prevents that catalytic combustor 2 from rocking and leading to catalytic combustor 2 self to damage or crash heat exchanger 1 inside heat exchanger 1.

Further, the burner holding structures 5 are respectively arranged on both sides of the catalytic 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 positioning of the catalytic burner 2 by the burner holding structures 5 is more reliable.

Specifically, 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.

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 catalytic burner 2 from above and below. In the embodiment shown in fig. 5, the heat exchanging portion 3 includes: the supporting heat exchange part 31 positioned at the lower part of the catalytic combustor 2 and the top limit heat exchange part 321 positioned at the top part of the heat exchanger 2 further comprise side limit heat exchange parts 322 positioned at the side parts of the heat exchanger 2, and the supporting heat exchange part 31, the top limit heat exchange part 321 and the side limit heat exchange parts 322 can fix the catalytic combustor 2 without using extra connecting parts, thereby being beneficial to reducing the number of parts and lightening the total weight of the combustion heat exchange assembly 10.

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 combustor 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 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 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.

Referring to fig. 1 to 2 and 4, the heat exchanger 1 includes: the catalytic combustor comprises a peripheral enclosing plate 38, an upper heat exchanging portion 331 and a lower heat exchanging portion 332, wherein the upper heat exchanging portion 331 is located at the inner top of the peripheral enclosing plate 38, the lower heat exchanging portion 332 is located at the inner bottom of the peripheral enclosing plate 38, the catalytic combustor 2 is located in the middle area of the peripheral enclosing plate 38, and the preheating combustor 7 is located at the bottom of the peripheral enclosing plate 38.

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, 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 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 catalytic burner 2.

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 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 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 some embodiments, not shown, the surrounding panels are provided with a first mounting bracket corresponding to the end position of the catalytic burner 2 and a second mounting bracket corresponding to the end position of the preheating burner 7, and the first mounting bracket and the second mounting bracket are provided with a temperature sensor and an optical coupling detector, so as to monitor the temperature and the working condition of the catalytic burner 2 and the preheating burner 7 more accurately.

The gas water heater according to another aspect embodiment of the present invention comprises the combustion heat exchange assembly 10 of the above 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 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

1. A combustion heat exchange assembly, comprising:

the heat exchanger is internally provided with a heat exchanging part;

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

2. The combustion heat exchange assembly of claim 1, further comprising:

the preheating burner is arranged opposite to the catalytic burner and at least used for heating the catalytic burner.

3. The combustion heat exchange assembly of claim 1, further comprising:

the preheating burner is arranged on the catalytic burner, a set distance is arranged between the catalytic burner and the preheating burner, and the set distance ranges from 5mm to 80 mm.

4. The combustion heat exchange assembly of claim 2 or 3, wherein at least a portion of the heat exchange portion is located between the set spacing of the catalytic combustor and the preheat combustor.

5. The combustion heat exchange assembly of claim 1, further comprising: a burner retaining structure disposed inside the heat exchanger for retaining the catalytic burner.

6. The combustion heat exchange assembly of claim 5, wherein the burner retaining structures are disposed on either side of the catalytic burner.

7. The combustion heat exchange assembly of claim 5, wherein the burner retention structure comprises: a clamping groove in which a portion of the burner is fitted.

8. The combustion heat exchange assembly of claim 7 wherein the clamping groove forms a clamping fit with the catalytic combustor on at least two sides.

9. The combustion heat exchange assembly of claim 8, wherein the burner retention structure comprises: the upper wall, the connecting wall and the lower wall surround a clamping groove with an opening facing the catalytic combustor, and the clamping groove and the catalytic combustor form clamping fit on three sides.

10. The combustion heat exchange assembly of claim 5 wherein the burner retention structure is a pair of spaced apart "U" shaped structures with openings facing each other.

11. The combustion heat exchange assembly of claim 5, wherein the burner holding structure has a channel therein, the channel communicating with a heat exchange medium channel in the heat exchange portion.

12. The combustion heat exchange assembly of claim 11, wherein the heat exchanger has a water inlet and a water outlet, the channel within the burner retaining structure being closer to the water inlet than the water outlet.

13. The combustion heat exchange assembly of claim 12, wherein an upper heat exchange portion is provided at an upper portion of the burner holding structure, a lower heat exchange portion is provided at a lower portion of the burner holding structure, the lower heat exchange portion is connected to the water inlet, and the upper heat exchange portion is connected to the water outlet.

14. The combustion heat exchange assembly of claim 13 wherein at least a portion of the upper heat exchange portions are located directly above the burner-retaining structure and the catalytic burner and the lower heat exchange portions are in two spaced apart groups and are located directly below the two burner-retaining structures, respectively.

15. The combustion heat exchange assembly of claim 12, wherein the water introduced into the heat exchanger from the water inlet passes through the lower heat exchange portion, the burner holding structure, and the upper heat exchange portion in this order, and the number of times of the water being turned back through the lower heat exchange portion is less than the number of times of the water being turned back through the upper heat exchange portion.

16. The combustion heat exchange assembly of claim 15, wherein the lower heat exchange portion is more sparse than the upper heat exchange portion.

17. The combustion heat exchange assembly of claim 15, wherein a cross-sectional area of the burner holding structure is larger than a cross-sectional area of any one of the heat exchange portions.

18. The combustion heat exchange assembly of claim 2 or 3, wherein the heat exchanger comprises: bounding wall, upper portion heat transfer portion and lower part heat transfer portion all around, the upper portion heat transfer position in the inside top of bounding wall all around, the lower part heat transfer position in the interior bottom of bounding wall all around, the catalytic combustor is located the middle part region of bounding wall all around, the preheating combustor is located the bottom of bounding wall all around.

19. The combustion heat exchange assembly of claim 18, further comprising: the mounting bracket is arranged on the surrounding enclosing plates and corresponds to the end part of the catalytic combustor, and mounting holes are formed in the mounting bracket.

20. The combustion heat exchange assembly of claim 19, wherein the mounting hole is used for mounting a thermocouple or a photoresistor.

21. The combustion heat exchange assembly of claim 2 or 3, wherein the surrounding panels are provided with a first mounting bracket and a second mounting bracket, the first mounting bracket corresponds to the end position of the catalytic combustor, the second mounting bracket corresponds to the end position of the preheating combustor, and the first mounting bracket and the second mounting bracket are both provided with a temperature sensor and an optical coupling detector.

22. A gas water heater comprising a combustion heat exchange assembly according to any one of claims 1-21.