Combustion chamber for gas water heater and gas water heater

Abstract

The utility model provides a combustion chamber for a gas water heater and the gas water heater, the combustion chamber for the gas water heater comprises a shell, the shell defines a combustion cavity, the peripheral wall of the shell forms a heat dissipation assembly, and the heat dissipation assembly comprises an air inlet cooling channel capable of leading air into the combustion cavity. According to the combustion chamber for the gas water heater and the gas water heater, the combustion system and the heat dissipation system are integrally designed, air cooling is achieved through the air inlet cooling channel formed by the peripheral wall of the shell, and the heat dissipation function is completed while combustion air is introduced. According to the structure, the use of independent heat dissipation parts is reduced, the production cost is reduced, and the heat dissipation uniformity and the shell structural strength are improved through the integrated design of the air flowing path.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of water heater, especially a combustion chamber for gas water heater and gas water heater. BACKGROUND

[0002] As a common household appliance, gas water heater is widely used in household hot water supply. With the development of technology, the types and functions of gas water heater are also increasing, among which the gas water heater is favored by the market due to its reasonable structure design. However, the existing gas water heater faces some problems to be solved in the development and production process.

[0003] The existing gas water heater usually adopts a split type design architecture of combustion system and heat dissipation system, in which the cooling water pipe arranged on the heat exchanger shell constitutes the main heat dissipation component. This traditional water cooling heat dissipation scheme has the following significant defects: first, the split type structure needs to additionally configure a cooling pipe system, resulting in increased material cost and assembly cost; second, the heat dissipation path of the tubular water cooling structure has a heat conduction blind area, causing uneven temperature field distribution on the surface of the heat exchanger, affecting the stability of thermal efficiency; third, the current water cooling scheme is limited by material properties and can only adapt to copper heat exchangers with high ductility, but the surface hardness of copper material is insufficient, which is prone to structural deformation during transportation or use when encountering external impact, affecting the service life of the equipment. SUMMARY

[0004] The technical problem to be solved by the utility model is to overcome the defects of high cost, unstable thermal efficiency and easy structural deformation of the combustion system and heat dissipation system of the existing gas water heater, increase the cost, and reduce the production efficiency, and provide a combustion chamber for gas water heater and gas water heater.

[0005] The utility model solves the above technical problems by the following technical scheme:

[0006] A combustion chamber for gas water heater, comprising:

[0007] A shell defining a combustion chamber, the peripheral wall of the shell forming the heat dissipation assembly, the heat dissipation assembly comprising an air inlet cooling channel capable of introducing air into the combustion chamber.

[0008] In this scheme, the combustion system and the heat dissipation system are designed integrally by adopting the above structure, and the air cooling is realized through the air inlet cooling channel formed by the peripheral wall of the shell, which completes the heat dissipation function while introducing combustion air. This structure reduces the use of independent heat dissipation components, reduces the production cost, and improves the heat dissipation uniformity and the strength of the shell structure through the integrated design of the air flow path.

[0009] Preferably, the combustion chamber further comprises:

[0010] A primary air hole is formed on the shell, and the primary air hole forms a coaxial or tangential air flow channel with the gas nozzle;

[0011] A secondary air hole is formed on the shell, and the secondary air hole is arranged away from the burner of the combustion chamber compared with the primary air hole;

[0012] The air inlet areas of the air inlet cooling channel, the primary air hole, and the secondary air hole satisfy the ratio of 1:2:3.

[0013] In the scheme, by setting the air inlet area ratio (1:2:3) of the primary air hole, the secondary air hole, and the air inlet cooling channel, a gradient air supply is formed near the burner, which not only ensures sufficient premixing of gas and air to improve combustion efficiency, but also enhances the oxygen supplement effect through the secondary air hole away from the burner, and reasonably allocates the cooling air volume to achieve dynamic balance between combustion and heat dissipation, avoiding deformation of the shell caused by high-temperature area concentration.

[0014] Preferably, the air inlet area of the air inlet cooling channel is between 680 square millimeters and 750 square millimeters;

[0015] The air inlet area of the primary air hole is between 1360 square millimeters and 1500 square millimeters;

[0016] The air inlet area of the secondary air hole is between 2040 square millimeters and 2250 square millimeters.

[0017] In the scheme, by limiting the specific air inlet area range of the air inlet cooling channel, the primary air hole, and the secondary air hole, the air flow ratio of the combustion and heat dissipation system is standardized, and on the basis of ensuring sufficient gas combustion, the cooling air volume is used to accurately control the shell surface temperature distribution, while reducing the production and assembly errors caused by size fluctuations.

[0018] Preferably, the shell includes a bottom plate, and the secondary air hole is arranged on the bottom plate.

[0019] In the scheme, by arranging the secondary air hole on the bottom plate of the combustion chamber, the negative pressure area formed by the rising combustion gas flow is used to enhance the secondary air suction power, which not only improves the oxygen supplement effect of the flame tail, but also avoids the loss of structural strength caused by too many holes on the side of the shell, and simplifies the cleaning and maintenance process of the bottom area.

[0020] Preferably, the shell includes a plurality of side panels, and the plurality of side panels surround the peripheral wall of the shell and have a hollow interlayer inside.

[0021] In the scheme, the above structure is adopted, the hollow sandwich side panel design is adopted, the shell peripheral wall is converted into a distributed heat dissipation channel, the air cooling function and the shell rigidity enhancement are realized simultaneously through the sandwich structure, the traditional external heat dissipation fin structure is replaced, the material cost is reduced, and the overall structural stability of the combustion chamber is improved.

[0022] Preferably, the side panel comprises an inner side panel and an outer side panel, the inner side panel and the outer side panel are arranged in a spaced manner to form the hollow sandwich, a first through hole is formed on the outer side panel, a second through hole is formed on the inner side panel, and the first through hole and the second through hole are arranged in a staggered manner.

[0023] The first through hole, the hollow sandwich, and the second through hole form the air inlet cooling channel.

[0024] In the scheme, the above structure is adopted, the air inlet cooling channel is formed by staggered arrangement of the through holes of the inner side panel and the outer side panel, the heat exchange time of air in the sandwich is prolonged, the heat dissipation efficiency is improved, the weakening of the panel strength caused by the straight-through hole is avoided, and the cooling effect and the structural integrity of the shell are considered.

[0025] Preferably, the distance between the inner side panel and the outer side panel is 6mm.

[0026] And / or

[0027] The diameter of the first through hole and the second through hole is 3mm.

[0028] In the scheme, the above structure is adopted, the air inlet cooling channel is formed by staggered arrangement of the through holes of the inner side panel and the outer side panel, the heat exchange time of air in the sandwich is prolonged, the heat dissipation efficiency is improved, the weakening of the panel strength caused by the straight-through hole is avoided, and the cooling effect and the structural integrity of the shell are considered.

[0029] Preferably, the combustion chamber further comprises a fire grate assembly, the fire grate assembly comprises a plurality of fire grate units, the number of primary air holes corresponds to the number of fire grate units one by one and is connected.

[0030] In the scheme, the above structure is adopted, the air inlet cooling channel is formed by staggered arrangement of the through holes of the inner side panel and the outer side panel, the heat exchange time of air in the sandwich is prolonged, the heat dissipation efficiency is improved, the weakening of the panel strength caused by the straight-through hole is avoided, and the cooling effect and the structural integrity of the shell are considered.

[0031] Preferably, the gas nozzle and the primary air hole are coaxially arranged one by one, the combustion chamber has six gas nozzles, and / or the diameter of the gas nozzle is 2.05mm.

[0032] In the scheme, the above structure is adopted, the gas nozzle is coaxially arranged with the primary air hole and the number is matched, the gas jet and the air flow direction are accurately coordinated, the combustion stability is improved, the standard nozzle layout is realized, the heat load of the combustion chamber is uniformly distributed, and the thermal shock of local high temperature on the shell is reduced.

[0033] A gas water heater comprises the combustion chamber for the gas water heater.

[0034] The gas water heater with the integrated combustion chamber reduces the number of independent parts by fusing the structure of the combustion system and the heat dissipation system, reduces the weight and production cost of the whole machine, cooperatively controls the combustion efficiency and the shell temperature by using the multi-layer air inlet cooling channel, and improves the equipment reliability and service life.

[0035] The utility model discloses a kind of combustion chamber and gas water heater for gas water heater. Combustion system and heat dissipation system are integrated design, air cooling is realized by the air inlet cooling channel formed by shell peripheral wall, and heat dissipation function is completed while introducing combustion air. The structure reduces the use of independent heat dissipation component, reduces production cost, and improves heat dissipation uniformity and shell structure strength by the integrated design of air flow path. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is the explosion structure schematic view of the combustion chamber of the utility model embodiment.

[0037] Figure 2 It is the explosion structure schematic view of one side panel of the utility model embodiment.

[0038] Figure 3 It is the cross-sectional structure schematic view of another side panel of the utility model embodiment.

[0039] Figure 4 It is the structure schematic view of secondary air baffle of the utility model embodiment.

[0040] Figure 5 It is the structure schematic view of secondary air hole and gas nozzle of the utility model embodiment.

[0041] REFERENCE SIGNS:

[0042] Side panel 1

[0043] Outer side plate 11

[0044] First through hole 111

[0045] Outer folding edge 112

[0046] First boss 113

[0047] Observation hole 114

[0048] inner side plate 12

[0049] second through hole 121

[0050] observation window 123

[0051] fire grate assembly 2

[0052] flame stabilizing plate 23

[0053] secondary air plate 3

[0054] secondary air hole 31

[0055] primary air hole 13

[0056] gas nozzle 4 DETAILED DESCRIPTION

[0057] A preferred embodiment is described below in conjunction with the accompanying drawings so as to make the present application more comprehensible and complete.

[0058] As Figure 1 shown, a combustion chamber for a gas water heater includes a housing defining a combustion chamber, a peripheral wall of the housing forming a heat dissipation assembly, the heat dissipation assembly including an air intake cooling channel capable of introducing air into the combustion chamber. The combustion system is designed in one with the heat dissipation system, and air cooling is achieved through the air intake cooling channel formed by the peripheral wall of the housing, thereby completing the heat dissipation function while introducing combustion air. This structure reduces the use of independent heat dissipation components, reduces production costs, and improves heat dissipation uniformity and housing structural strength through integrated design of the air flow path.

[0059] In this embodiment, the fire grate assembly 2 is below the combustion chamber, the gas enters the combustion chamber from the fire grate assembly 2 and burns, and the heat exchange tube is above the combustion chamber, the water flow to be heated is in the heat exchange tube, and the high-temperature flue gas generated by the combustion of the gas in the combustion chamber flows upward and passes through the heat exchange tube to heat the water flow in the heat exchange tube. The peripheral wall of the combustion chamber is a hollow structure, and the inner and outer sides are both open and can conduct air between the inside and outside, thereby cooling and supplementing air. The fire grate assembly 2 includes a plurality of fire grate units.

[0060] As Figures 2 to 5 shown, the combustion chamber further includes a primary air hole 13, the primary air hole 13 is provided on the housing, the primary air hole 13 and the gas nozzle 4 form a coaxial or tangential air flow channel; a secondary air hole 31, the secondary air hole 31 is provided on the housing, the secondary air hole 31 is arranged away from the burner of the combustion chamber compared to the primary air hole 13; an air intake cooling channel, the air intake area of the primary air hole 13 and the secondary air hole 31 satisfies 1:2:3.

[0061] By setting the air inlet area ratio of the primary air hole 13, the secondary air hole 31 and the air inlet cooling channel (1:2:3), a gradient air supply is formed near the burner, which not only ensures sufficient premixing of gas and air to improve combustion efficiency, but also enhances the oxygen supplement effect through the secondary air hole 31 away from the burner, while reasonably distributing the cooling air volume to achieve dynamic balance between combustion and heat dissipation, avoiding shell deformation caused by high temperature concentration.

[0062] In this embodiment, the air inlet area of the air inlet cooling channel is between 680 square millimeters and 750 square millimeters; the air inlet area of the primary air hole 13 is between 1360 square millimeters and 1500 square millimeters; and the air inlet area of the secondary air hole 31 is between 2040 square millimeters and 2250 square millimeters.

[0063] By limiting the specific air inlet area range of the air inlet cooling channel, the primary air hole 13 and the secondary air hole 31, the air flow ratio of the combustion and heat dissipation system is standardized, which not only ensures sufficient combustion of gas, but also precisely controls the shell surface temperature distribution using cooling air volume, while reducing production and assembly errors caused by size fluctuations.

[0064] As shown in Figure 4 , the shell includes a bottom plate, and the secondary air hole 31 is arranged on the bottom plate. In this scheme, the secondary air hole 31 is arranged on the bottom plate of the combustion chamber using the above structure, and the negative pressure area formed by the rising combustion gas is used to enhance the secondary air suction power, which not only improves the oxygen supplement effect of the flame tail, but also avoids the loss of structural strength caused by too many holes on the side of the shell, and simplifies the cleaning and maintenance process of the bottom area.

[0065] As shown in Figure 1 , the shell includes a plurality of side panels 1, and the plurality of side panels 1 surround the peripheral wall of the shell to form a hollow interlayer inside the side panel 1. The hollow interlayer side panel design converts the peripheral wall of the shell into a distributed heat dissipation channel, which realizes air cooling function and shell rigidity enhancement at the same time through the interlayer structure, replaces the traditional external cooling fin structure, reduces material cost and improves the overall structural stability of the combustion chamber.

[0066] As shown in Figure 3 , the side panel 1 includes an inner side plate 12 and an outer side plate 11, and the inner side plate 12 and the outer side plate 11 are arranged in a hollow interlayer. The first through hole 111 is arranged on the outer side plate 11, and the second through hole 121 is arranged on the inner side plate 12. The first through hole 111 and the second through hole 121 are arranged in a staggered manner; the first through hole 111, the hollow interlayer and the second through hole 121 form an air inlet cooling channel. By arranging the through holes of the inner side plate 12 and the outer side plate 11 in a staggered manner, a detour cooling air flow path is formed, which prolongs the heat exchange time of air in the interlayer, improves the heat dissipation efficiency, avoids the weakening of the panel strength caused by the straight-through hole, and balances the cooling effect and the structural integrity of the shell.

[0067] In this embodiment, the distance between the inner side plate 12 and the outer side plate 11 is 6 mm. The diameter of the first through hole 111 and the second through hole 121 is 3 mm. The air flow path is formed by the staggered arrangement of the through holes of the inner side plate 12 and the outer side plate 11, which prolongs the heat exchange time of the air in the sandwich, improves the heat dissipation efficiency, avoids the weakening of the panel strength caused by the straight-through hole, and balances the cooling effect and the structural integrity of the shell.

[0068] As shown in Figure 5 The number of primary air holes 13 corresponds to the number of fire row units.

[0069] The air flow path is formed by the staggered arrangement of the through holes of the inner side plate 12 and the outer side plate 11, which prolongs the heat exchange time of the air in the sandwich, improves the heat dissipation efficiency, avoids the weakening of the panel strength caused by the straight-through hole, and balances the cooling effect and the structural integrity of the shell.

[0070] As shown in Figure 5 The number of gas nozzles 4 corresponds to the number of primary air holes 13 and is coaxially arranged. The combustion chamber has six gas nozzles 4, and / or the diameter of the gas nozzle 4 is 2.05 mm. The gas nozzle 4 is coaxially arranged with the primary air hole 13 and the number is matched, which ensures the precise cooperation of the gas jet and the air flow direction, improves the combustion stability, and at the same time realizes the uniform distribution of the heat load of the combustion chamber through the standardized nozzle layout, reduces the thermal shock of the shell caused by local high temperature.

[0071] The embodiment also provides a gas water heater, which comprises the above-mentioned combustion chamber for a gas water heater. The gas water heater with an integrated combustion chamber reduces the number of independent parts through the structural integration of the combustion system and the heat dissipation system, reduces the weight and production cost of the whole machine, and at the same time utilizes the multi-layer air inlet cooling channel to cooperatively control the combustion efficiency and the shell temperature, improves the equipment reliability and service life.

Claims

1. A combustion chamber for a gas water heater, characterised in that, It comprises: a shell defining a combustion cavity, a peripheral wall of the shell forming a heat dissipation assembly, the heat dissipation assembly comprising an air inlet cooling channel capable of introducing air into the combustion cavity.

2. The combustion chamber for a gas water heater as claimed in claim 1, wherein, The combustion chamber further comprises: a primary air hole, the primary air hole being formed on the shell, the primary air hole forming a coaxial or tangential air flow channel with the gas nozzle; a secondary air hole, the secondary air hole being formed on the shell, the secondary air hole being arranged away from the burner of the combustion chamber compared to the primary air hole; The air inlet area of the air inlet cooling channel, the primary air hole, and the secondary air hole satisfies the ratio of 1:2:

3.

3. The combustion chamber for a gas water heater as claimed in claim 2, wherein The air inlet area of the air inlet cooling channel is between 680 square millimeters and 750 square millimeters; The air inlet area of the primary air hole is between 1360 square millimeters and 1500 square millimeters; The air inlet area of the secondary air hole is between 2040 square millimeters and 2250 square millimeters.

4. The combustion chamber for a gas water heater as claimed in claim 2, wherein The shell comprises a secondary air plate, the secondary air hole being arranged on the secondary air plate, and the secondary air plate being arranged at the bottom of the combustion chamber.

5. The combustion chamber for a gas water heater as claimed in claim 2, wherein The shell comprises a plurality of side panels, the plurality of side panels surrounding the peripheral wall of the shell, and the side panels having a hollow interlayer inside.

6. The combustion chamber for a gas water heater as claimed in claim 5, wherein The side panels comprise an inner side panel and an outer side panel, the inner side panel and the outer side panel being arranged in a spaced manner to form the hollow interlayer, a first through hole being formed on the outer side panel, and a second through hole being formed on the inner side panel, the first through hole and the second through hole being arranged in a staggered manner; The first through hole, the hollow interlayer, and the second through hole constitute the air inlet cooling channel.

7. The combustion chamber for a gas water heater as claimed in claim 6, wherein The distance between the inner side panel and the outer side panel is 6mm; And / or The diameter of the first through hole and the second through hole is 3mm.

8. The combustion chamber for a gas water heater as claimed in claim 2, wherein, The combustion chamber further comprises a fire grate assembly, the fire grate assembly comprising a plurality of fire grate units, the number of the primary air holes corresponding to the number of the fire grate units.

9. The combustion chamber for a gas water heater as claimed in claim 8, wherein, The number of the gas nozzles corresponds to the number of the primary air holes, and the gas nozzles are coaxially arranged, the combustion chamber having six gas nozzles, and / or the diameter of the gas nozzle is 2.05mm.

10. A gas water heater, characterized by, It comprises the combustion chamber for a gas water heater according to any one of claims 1 to 9.

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