Combustor and gas water heater

Abstract

The utility model relates to the technical field of household appliances, and discloses a burner and a gas water heater, the burner comprises a burner main body, a gas inlet and a fire hole are formed on the burner main body, the gas inlet is used for introducing gas, and the fire hole is communicated with the gas inlet; the water collecting flow channel and the fire holes are formed in the surface of the same side of the combustor body, and the water collecting flow channel and the fire holes are spaced and used for collecting condensate water in smoke generated by combustion of the combustor; and the water outlet is formed in the burner main body, communicates with the water collecting flow channel and is used for discharging condensate water. According to the combustor, the problem that condensate water falls into the fire holes in the prior art can be solved, the situation that normal work of the combustor is affected due to the fact that the condensate water falls into the fire holes can be avoided, and the combustor works more stably, the number of used parts is small, and the occupied space is small.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, and particularly relates to a burner and a gas water heater. Background Art

[0002] As a commonly used household appliance, the core function of a gas water heater is to heat water by burning gas to provide a stable hot water supply for the family.

[0003] A gas water heater generally includes a burner, a combustion chamber provided on the burner, and a heat exchanger covering the upper part of the combustion chamber. The flue gas generated during the combustion of the burner is discharged outward after heat exchange through the heat exchanger to improve the thermal efficiency of the gas water heater. However, during the heat exchange process, some water vapor in the flue gas will be liquefied to generate condensed water, and the condensed water falls into the flame holes of the burner, affecting the normal operation of the gas water heater. Summary of the Utility Model

[0004] In view of this, the utility model provides a burner and a gas water heater to solve the problem that the condensed water falls into the flame holes of the burner during the use of the gas water heater, affecting the normal operation of the gas water heater.

[0005] In the first aspect, the utility model provides a burner, comprising:

[0006] A burner body, on which a gas inlet and flame holes are formed. The gas inlet is used for introducing gas, and the flame holes are communicated with the gas inlet;

[0007] A water collecting channel, which is arranged on the same side surface of the burner body as the flame holes and is spaced apart from the flame holes, and is used for collecting the condensed water in the flue gas generated by the combustion of the burner;

[0008] A water outlet, which is formed on the burner body and is communicated with the water collecting channel, and is used for discharging the condensed water.

[0009] Advantageous Effects: The burner of the embodiment of the utility model is provided with a water collecting channel and a water outlet on the side surface of the burner body where the flame holes are located. Among them, the water collecting channel can be used to collect the condensed water converted from the flue gas generated by the combustion of the burner and discharge it through the water outlet, thereby preventing the condensed water from falling into the flame holes of the burner and affecting the normal operation of the burner.

[0010] In addition, when the efficiency of the heat exchanger is too high, the flue gas will exchange heat with the heat exchanger to generate condensed water, which will drip downward onto the burner. Therefore, in order to prevent the condensed water from falling into the fire holes, in the related art, the efficiency of the heat exchanger is limited, and only by adding a secondary heat exchanger can the heat efficiency be improved. This results in a relatively large number of parts used in the burner and a large occupied space. The burner according to the embodiment of the present application is provided with a water collection channel and a water outlet on the burner body to discharge the condensed water generated during the heat exchange process. As a result, the efficiency of the heat exchanger can be set relatively high, and a high heat efficiency can be ensured without adding a secondary heat exchanger, reducing the number of parts required for the burner and helping to reduce the space occupied by the burner.

[0011] Therefore, the burner according to the embodiment of the present application can overcome the problem in the related art that the condensed water falls into the fire holes, and can prevent the condensed water from falling into the fire holes, which may affect the normal operation of the burner. The burner according to the embodiment of the present application operates more stably, uses fewer parts, and occupies less space.

[0012] In an optional embodiment, the burner further includes a cover body that covers the burner body. A flue gas outlet is formed on the cover body, and a combustion chamber is formed between the cover body and the burner body.

[0013] The water collection channel further includes:

[0014] A first channel that is arranged along the edge of the burner body and is located inside the cover body. The first channel is communicated with the water outlet.

[0015] Beneficial effects:

[0016] During the use of the burner according to the embodiment of the present application, the flue gas first contacts the cover body and exchanges heat with the cover body, and then is output through the flue gas outlet and exchanges heat with the heat exchanger. During this process, part of the water vapor carried in the flue gas exchanges heat with the cover body to generate condensed water. The generated condensed water can flow downward along the inner wall of the cover body and fall into the surrounding water collection channels, and finally be discharged through the water outlet.

[0017] In an optional embodiment, along a specified direction, the water collection channel is inclined downward, and the water outlet is communicated with the lowest point of the water collection channel.

[0018] Beneficial effects: With such a setting, the water in the water collection channel can be converged by gravity and brought to the water outlet, and then discharged outward through the water outlet.

[0019] In an optional embodiment, the water collection channel includes:

[0020] A plurality of second flow channels are provided within the first flow channel, with both ends connected to the first flow channel. The plurality of second flow channels extend in a first direction and are spaced apart in a second direction. There are flame holes provided between adjacent second flow channels, and an included angle is formed between the first direction and the second direction.

[0021] Beneficial effects:

[0022] During the combustion process of the burner, a large amount of flue gas is generated. The flue gas flows through the heat exchanger and undergoes heat exchange with the heat exchanger, thereby improving the thermal efficiency of the burner. In this process, a part of the water vapor carried in the flue gas is converted into condensed water. The second flow channels can receive and discharge this part of the condensed water through the water outlet, so as to prevent the condensed water from falling into the flame holes of the burner and affecting the normal use of the burner.

[0023] On this basis, both ends of the intermediate flow channel are respectively connected to the first flow channel. By setting it in this way, the condensed water collected at the second flow channels can flow into the first flow channel and then be discharged outwards through the water outlet.

[0024] In an optional embodiment, the burner further includes:

[0025] A burner water inlet joint and a burner water outlet joint, which are respectively provided on both sides of the burner body;

[0026] A plurality of heat exchange pipelines are provided within the burner body, with both ends respectively connected to the burner water inlet joint and the burner water outlet joint.

[0027] Beneficial effects:

[0028] By setting it in this way, the burner water inlet joint can be used to connect to a water source. The water flow can flow from one end of the burner to the other end through the heat exchange flow channels and finally be output through the burner water outlet joint. It can not only directly heat the water through the burner body to improve the thermal efficiency of the gas water heater, but also enable the cold water to cool the burner body, preventing the occurrence of flame flashback due to excessive temperature and further stabilizing the flame state. At the same time, since the low-temperature burner body reduces the flame temperature, the generation of thermal type nitrogen oxides can be reduced, and the emission of nitrogen oxides can be further reduced.

[0029] In an optional embodiment, the heat exchange pipelines extend in the first direction and are arranged in one-to-one correspondence with the second flow channels.

[0030] In an optional embodiment, the cover body further includes:

[0031] An inner wall, which surrounds the combustion chamber;

[0032] An outer wall, which is arranged to surround the inner wall, and a closed cavity is formed between the inner wall and the outer wall;

[0033] The cover body water inlet joint is provided on the cover body and is connected to the cavity. The cover body water inlet joint is connected to the burner water outlet joint;

[0034] The cover body water outlet joint is provided on the cover body and is connected to the cavity, and is used to output the water in the cavity.

[0035] Beneficial effects: When the burner in the embodiment of the present application burns, the flame and high-temperature flue gas can contact the inner wall of the cover body. The flame directly transfers heat to the water in the cavity of the cover body, thereby significantly reducing the heat loss of the burner. At the same time, when the high-temperature flue gas contacts the inner wall of the cover body, a part of the gaseous water carried in the flue gas is condensed into liquid water, thereby releasing latent heat.

[0036] By setting like this, the cover body can reduce the heat loss of the burner and absorb the latent heat of the gaseous water at the same time, thereby significantly improving the thermal efficiency of the burner. And because the burner body in the embodiment of the present application is provided with a first flow channel, therefore, the condensed water generated after the flue gas exchanges heat with the cover body can flow along the inner wall of the cover body into the first flow channel and be discharged outwards through the water outlet, avoiding the condensed water flowing into the fire holes and affecting the normal use of the burner.

[0037] In an alternative embodiment, the burner body includes:

[0038] The combustion plate has multiple gas inlets, which are distributed on one side surface of the combustion plate. Multiple fire holes are provided on the other side surface of the combustion plate and are arranged in one-to-one correspondence with the gas inlets.

[0039] In a second aspect, the present utility model further provides a gas water heater, including:

[0040] A blower;

[0041] The burner provided in the first aspect of the present utility model is arranged at the air outlet of the blower;

[0042] The water inlet pipe is connected to the water circuit of the burner and is used to supply water to the burner;

[0043] The heat exchanger is arranged above the burner and is used to exchange heat with the flue gas generated by the combustion of the burner. The water circuit of the heat exchanger is connected to the water circuit of the burner;

[0044] The water storage container is connected to the water outlet of the burner and is used to receive the condensed water output from the water outlet of the burner.

[0045] Beneficial effects: The gas water heater according to the second aspect of the embodiments of the present utility model includes or uses the burner according to the first aspect of the present utility model, and thus has its beneficial effects, that is, it can overcome the problem in the related art that the condensed water falls into the fire holes, and can prevent the condensed water from falling into the fire holes, which may affect the normal operation of the burner. The gas water heater according to the embodiments of the present application operates more stably, uses fewer parts, and occupies less space.

[0046] In an optional embodiment, the gas water heater further includes:

[0047] An atomizer, a water storage container is formed inside the atomizer, the atomizer is used for atomizing the condensed water, and an exhaust port for discharging water mist is formed on the atomizer.

[0048] Beneficial effects: In the related art, since the condensed water needs to be discharged into the sewer, if the gas water heater is installed in the kitchen, the floor cabinet needs to be modified, and the condensed water is output to the sewer through a drain pipe. If the gas water heater is installed on the balcony, a floor drain needs to be installed on the balcony. Therefore, not only the installation process of the gas water heater is complicated, but also the aesthetics of the decoration layout is affected.

[0049] In an optional embodiment, the gas water heater further includes:

[0050] A housing, a blower, a burner, a heat exchanger and an atomizer are arranged inside the housing;

[0051] An exhaust hood, which is arranged on the side of the heat exchanger away from the burner, and an exhaust pipe is arranged on the exhaust hood, and the exhaust pipe passes through the housing for discharging flue gas;

[0052] A mist discharge pipe, which is arranged inside the housing and is connected between the air outlet of the atomizer and the exhaust pipe.

[0053] Beneficial effects: In the embodiments of the present application, the condensed water is atomized into water vapor by the atomizer and then discharged. Therefore, the condensed water can be output without installing a sewer and a floor drain, thereby simplifying the installation steps of the gas water heater and helping to improve the aesthetics of the decoration layout.

[0054] On this basis, in the related art, in order to improve the thermal efficiency of the gas water heater, the gas water heater generally includes a main heat exchanger and a secondary heat exchanger. After the gas burns, high-temperature flue gas at 800 - 1000 °C is generated. When the high-temperature flue gas flows through the main heat exchanger, heat is transferred to the main heat exchanger. Since the main heat exchanger is located above the burner, in order to avoid directly generating a large amount of condensed water above the burner, which may affect the normal operation of the burner, the thermal efficiency of the main heat exchanger is generally set to about 87%. After the flue gas exchanges heat with the main heat exchanger, it becomes low-temperature flue gas at about 140 °C - 160 °C.

[0055] When the low-temperature flue gas flows through the auxiliary heat exchanger, heat is released again. Since the flue gas temperature drops to 40°C - 60°C, the gaseous water is condensed into liquid water, and latent heat is released simultaneously. This part of the latent heat is absorbed by the auxiliary heat exchanger. The thermal efficiency of the auxiliary heat exchanger is generally 13% - 17%.

[0056] However, since the water temperature inside the auxiliary heat exchanger is about 20 degrees, the 20-degree water temperature is likely to reduce the flue gas temperature of 140°C - 160°C to the dew point (60°C - 80°C). At this time, a large amount of condensed water will be generated. When there is too much condensed water and the atomizer cannot handle it in time, it is easy to cause the condensed water to backflow into the heat exchanger and the burner, resulting in burner failure. In addition, the condensed water remaining in the water heater is likely to breed bacteria and even produce peculiar smells.

[0057] In the gas water heater according to the embodiment of the present application, a water collecting flow channel is provided at the burner main body, thereby allowing the thermal efficiency of the heat exchanger to be set relatively high. The thermal efficiency of the heat exchanger of the gas water heater according to the embodiment of the present application is about 94.5%. On this basis, the cover body is arranged to include an inner wall and an outer wall, and a cavity is formed between the inner wall and the outer wall. The water in the cavity can be used for heat exchange with the flame and the high-temperature flue gas, thereby significantly reducing the heat loss at the combustion chamber position. By setting like this, the thermal efficiency at the cover body is about 4% - 5%. Among them, about 2% of the thermal efficiency comes from the latent heat of condensed water, and about 3% of the thermal efficiency comes from the recovery of heat loss. The thermal efficiency of the gas water heater according to the embodiment of the present application is about 98.5 - 99.5%.

[0058] That is to say, since the gas water heater according to the embodiment of the present application can reduce the heat loss at the combustion chamber position through the cover body, a relatively high thermal efficiency is ensured without absorbing a large amount of latent heat of water vapor, and the amount of condensed water generated during the use of the gas water heater is greatly reduced. The amount of condensed water generated by the gas water heater according to the embodiment of the present application during use is about one-tenth of that of the gas water heater including the main heat exchanger and the auxiliary heat exchanger. Also, since the amount of condensed water generated by the gas water heater according to the embodiment of the present application is small, the atomizer can fully atomize the water generated during the use of the gas water heater, thereby simplifying the installation steps of the gas water heater and improving the aesthetic property of the decoration layout.

[0059] In an optional implementation manner, the burner includes a burner main body and a cover body covering the burner main body. A burner water inlet joint and a burner water outlet joint are respectively provided on both sides of the burner main body. A cover body water inlet joint and a cover body water outlet joint are provided on the cover body. The water inlet pipe is connected to the burner water inlet joint, the burner water outlet joint is connected to the cover body water inlet joint of the cover body, and the cover body water outlet joint of the cover body is connected to the cold side inlet of the heat exchanger. Description of the Drawings

[0060] To more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0061] Figure 1 The front view of a gas water heater according to an embodiment of the present utility model;

[0062] Figure 2 is Figure 1 The perspective view of the gas water heater shown at an angle;

[0063] Figure 3 is Figure 1 The perspective view of the gas water heater shown at another angle;

[0064] Figure 4 is Figure 3 The partial sectional view of the gas water heater shown;

[0065] Figure 5 The top view of a burner according to an embodiment of the present utility model;

[0066] Figure 6 is Figure 5 The sectional view of the burner shown along line A-A;

[0067] Figure 7 is Figure 5 The sectional view of the burner shown along line B-B;

[0068] Figure 8 The front view of a burner according to an embodiment of the present utility model;

[0069] Figure 9 is Figure 8 The sectional view of the burner shown along line C-C;

[0070] Figure 10 The side view of a burner according to an embodiment of the present utility model;

[0071] Figure 11 The bottom view of a burner according to an embodiment of the present utility model;

[0072] Figure 12 The rear view of a burner according to an embodiment of the present utility model;

[0073] Figure 13 The exploded view of a burner according to an embodiment of the present utility model at an angle;

[0074] Figure 14 Explosion view of a burner according to an embodiment of the present utility model from another angle;

[0075] Figure 15 Top view of a burner according to an embodiment of the present utility model;

[0076] Figure 16 Fan, air duct assembly and burner of a gas water heater according to an embodiment of the present utility model;

[0077] Figure 17 is Figure 16 Explosion view of the fan, air duct assembly and burner of the gas water heater shown;

[0078] Figure 18 is Figure 16 Front view of the fan, air duct assembly and burner of the gas water heater shown;

[0079] Figure 19 is Figure 18 Cross-sectional view of the gas water heater shown along line D-D;

[0080] Figure 20 is Figure 19 Enlarged view of the burner body of the gas water heater;

[0081] Figure 21 is Figure 16 Right view of the fan, air duct assembly and burner of the gas water heater shown;

[0082] Figure 22 is Figure 16 Left view of the fan, air duct assembly and burner of the gas water heater shown;

[0083] Figure 23 is Figure 16 Top view of the fan, air duct assembly and burner of the gas water heater shown;

[0084] Figure 24 is Figure 16 Rear view of the fan, air duct assembly and burner of the gas water heater shown.

[0085] Explanation of reference numerals:

[0086] 1. Burner; 101. Burner body; 1011. Gas inlet; 10111. First inlet; 10112. Second inlet; 1012. Flame holes; 10121. First hole; 10122. Second hole; 1013. Burner water inlet joint; 1014. Burner water outlet joint; 1015. Heat exchange pipeline; 1016. Flame sensing assembly; 1017. Ignition needle assembly;

[0087] 102, Water collection channel; 1021, Second channel; 1022, First channel; 1023, Water outlet; 103, Cover body; 1031, Inner wall; 1032, Outer wall; 1033, Cavity; 1034, Cover body water inlet joint; 1035, Cover body water outlet joint; 104, Combustion chamber

[0088] 2, Fan

[0089] 3, Water inlet pipe

[0090] 4, Heat exchanger

[0091] 6, Atomizer; 601, Mist exhaust pipe

[0092] 7, Smoke exhaust hood; 701, Smoke exhaust pipe

[0093] 8, Gas valve

[0094] 9, Controller

[0095] 10, Housing

[0096] 11, Air duct assembly Detailed implementation manners

[0097] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0098] The following combines with Figures 1 to 24 , to describe the embodiments of the present utility model.

[0099] According to an embodiment of the present utility model, on the one hand, a burner 1 is provided, which includes a burner main body 101, a water collection channel 102, and a water outlet 1023. Among them, a gas inlet 1011 and a flame hole 1012 are formed on the burner main body 101. The gas inlet 1011 is used for introducing gas, and the flame hole 1012 is communicated with the gas inlet 1011. The water collection channel 102 and the flame hole 1012 are arranged on the same side surface of the burner main body 101 and are spaced apart from the flame hole 1012, and are used for collecting the condensed water in the flue gas generated by the combustion of the burner 1. The water outlet 1023 is formed on the burner main body 101 and is communicated with the water collection channel 102, and is used for discharging the condensed water.

[0100] In the burner 1 according to the embodiment of the present utility model, a water collecting channel 102 and a water outlet 1023 are formed on one surface of the burner body 101 where the flame holes 1012 are provided. Among them, the water collecting channel 102 can be used to collect the condensed water converted from the flue gas generated by the combustion of the burner 1 and discharge it through the water outlet 1023, thereby preventing the condensed water from falling into the flame holes 1012 of the burner 1 and affecting the normal operation of the burner 1.

[0101] In addition, when the efficiency of the heat exchanger is too high, the flue gas will exchange heat with the heat exchanger to generate condensed water, causing the condensed water to drip downward onto the burner. Therefore, in order to prevent the condensed water from dripping into the burner and causing equipment failure, in the related art, the efficiency of the heat exchanger is limited, and only by adding a secondary heat exchanger can the heat efficiency be improved, resulting in a larger number of parts used in the burner and a larger occupied space. The burner 1 according to the embodiment of the present application is provided with a water collecting channel 102 and a water outlet 1023 on the burner body 101 to discharge the condensed water generated during the heat exchange process, thereby allowing the efficiency of the heat exchanger 4 to be set relatively high, ensuring a high heat efficiency without adding a secondary heat exchanger 4, reducing the number of parts required for the burner 1, and helping to reduce the occupied space of the burner 1.

[0102] Therefore, the burner 1 according to the embodiment of the present application can overcome the problem in the related art that the condensed water falls into the flame holes 1012, prevent the condensed water from falling into the flame holes 1012 and affecting the normal operation of the burner 1. The burner 1 according to the embodiment of the present application works more stably, uses fewer parts, and occupies less space.

[0103] Preferably, in the embodiment of the present application, the burner body 101 further includes an ignition needle assembly 1017 and a flame sensing assembly 1016.

[0104] In one embodiment, the burner 1 further includes a cover 103 covering the burner body 101. A flue gas outlet is formed on the cover 103, and a combustion chamber 104 is formed between the cover 103 and the burner body 101.

[0105] The water collecting channel 102 further includes a first channel 1022. The first channel 1022 is arranged along the edge of the burner body 101 and is located inside the cover 103. The first channel 1022 is communicated with the water outlet 1023.

[0106] During the use of the burner 1 according to the embodiment of the present application, the flue gas first contacts the cover body 103 and exchanges heat with the cover body 103, and then is output through the flue gas outlet and exchanges heat with the heat exchanger 4. In this process, part of the water vapor carried in the flue gas exchanges heat with the cover body 103 to generate condensed water. The generated condensed water can flow downward along the inner wall 1031 of the cover body 103 and fall into the surrounding water collection channel, and finally is discharged through the water outlet 1023.

[0107] In one embodiment, as Figure 6 shown, along the specified direction, the water collection channel 102 slopes downward, and the water outlet 1023 is communicated with the lowest point of the water collection channel 102. With such a setting, the water in the water collection channel 102 can be converged by gravity to the water outlet 1023 and discharged outward through the water outlet 1023.

[0108] In one embodiment, as Figure 5 shown, the water collection channel 102 includes a plurality of second channels 1021. The second channels 1021 extend along the first direction, and the plurality of second channels 1021 are arranged at intervals along the second direction. There are flame holes 1012 between two adjacent second channels 1021, and an included angle is formed between the first direction and the second direction.

[0109] During the combustion process of the burner 1, a large amount of flue gas is generated. The flue gas flows through the heat exchanger 4 and exchanges heat with the heat exchanger 4, thereby improving the thermal efficiency of the burner 1. In this process, part of the water vapor carried in the flue gas is converted into condensed water. The second channels 1021 can receive and discharge this part of the condensed water through the water outlet 1023 to prevent the condensed water from falling into the flame holes 1012 of the burner 1 and affecting the normal use of the burner 1.

[0110] On this basis, both ends of the middle channel are respectively connected to the first channel 1022. With such a setting, the condensed water collected at the second channels 1021 can flow into the first channel 1022 and then be discharged outward through the water outlet 1023, which helps to simplify the flow path of the water collection channel 102.

[0111] In a preferred embodiment, as Figure 5 shown, a water storage tank is formed at the lowest point of the surrounding channel. The water storage tank is communicated with the water outlet 1023. The water storage tank can be used to increase the volume of the lowest point of the first channel 1022 to prevent the condensed water from overflowing after accumulating at the lowest point of the surrounding channel and causing the condensed water to fall into the flame holes 1012.

[0112] In one embodiment, as Figure 8 and Figure 13 shown, the first channel 1022 includes a groove arranged along the edge of the burner main body 101, and the water outlet 1023 is formed on the groove wall away from the second channels 1021.

[0113] In one embodiment, as Figure 13 and Figure 14 shown, the burner 1 further includes a burner water inlet joint 1013, a burner water outlet joint 1014, and a plurality of heat exchange pipelines 1015. Among them, the burner water inlet joint 1013 and the burner water outlet joint 1014 are respectively arranged on both sides of the burner body 101. The plurality of heat exchange pipelines 1015 are arranged inside the burner body 101, and the two ends are respectively connected to the burner water inlet joint 1013 and the burner water outlet joint 1014.

[0114] By setting it like this, the burner water inlet joint 1013 can be used to connect to a water source, and the water flow can flow from one end of the burner 1 to the other end through the heat exchange channel, and finally be output through the burner water outlet joint 1014. It can not only directly heat the water through the burner body 101 to improve the thermal efficiency of the gas water heater, but also enable the cold water to cool the burner body 101 to prevent the phenomenon of flame flashback due to too high temperature, and further stabilize the flame state. At the same time, since the low-temperature burner body 101 reduces the flame temperature, the generation of thermal type nitrogen oxides can be reduced, and the emission of nitrogen oxides can be further reduced.

[0115] In one embodiment, the heat exchange pipeline 1015 extends along the first direction and is arranged in one-to-one correspondence with the second flow channel 1021.

[0116] In one embodiment, as Figure 4 shown, the cover 103 further includes an inner wall 1031, an outer wall 1032, a cover water inlet joint 1034, and a cover water outlet joint 1035. Among them, the inner wall 1031 surrounds the combustion chamber 104. The outer wall 1032 is arranged around the outside of the inner wall 1031, and a closed cavity 1033 is formed between the inner wall 1031 and the outer wall 1032. The cover water inlet joint 1034 is arranged on the cover 103 and is communicated with the cavity 1033. The cover water inlet joint 1034 is connected to the burner water outlet joint 1014. The cover water outlet joint 1035 is arranged on the cover 103 and is communicated with the cavity 1033 for outputting the water in the cavity 1033.

[0117] When the burner 1 of the embodiment of the present application burns, the flame and the high-temperature flue gas can contact the inner wall 1031 of the cover 103, and the flame directly transfers heat to the water in the cavity 1033 of the cover 103, thereby significantly reducing the heat loss of the burner 1. At the same time, when the high-temperature flue gas contacts the inner wall 1031 of the cover 103, a part of the gaseous water carried in the flue gas is condensed into liquid water, thereby releasing latent heat.

[0118] By setting it like this, the cover 103 can reduce the heat loss of the burner 1 and at the same time absorb the latent heat of the gaseous water, thereby significantly improving the thermal efficiency of the burner 1. Also, since the burner main body 101 of the embodiment of the present application is provided with the first flow channel 1022, the condensed water generated after the flue gas exchanges heat with the cover 103 can flow along the inner wall 1031 of the cover 103 into the first flow channel 1022 and be discharged out through the water outlet 1023, avoiding the condensed water flowing into the flame holes 1012 and affecting the normal use of the burner 1.

[0119] In one embodiment, as Figure 7 shown, the burner main body 101 includes a combustion plate. There are multiple gas inlets 1011, which are distributed on one side surface of the combustion plate, and multiple flame holes 1012 are provided on the other side surface of the combustion plate and are arranged in one-to-one correspondence with the gas inlets 1011.

[0120] It should be noted that in the embodiment of the present application, the specific shapes of the flame holes 1012 and the gas inlets 1011 are not limited. Exemplarily, in the embodiment as Figure 5 shown, the flame holes 1012 are arranged in a "work" shape. Each flame hole 1012 includes a first hole 10121 in the middle and two second holes 10122 respectively arranged on both sides of the first hole 10121. The second holes 10122 are square holes.

[0121] As Figure 9 shown, each gas inlet 1011 includes a first inlet 10111 in the middle and second inlets 10112 respectively arranged on both sides of the first inlet 10111.

[0122] As a changeable implementation manner, the burner main body 101 includes a housing 10. A gas inlet 1011 is formed on one side surface of the housing 10, and multiple flame holes 1012 are formed on the other side surface.

[0123] According to an embodiment of the present invention, on the other hand, a gas water heater is also provided. As Figures 1 to 3 shown, the gas water heater includes: a blower 2, the burner 1 provided in the first aspect of the present invention, a water inlet pipe 3, a heat exchanger, and a water storage container. Among them, the burner 1 is arranged at the air outlet of the blower 2. The water inlet pipe 3 is connected to the water path of the burner 1 for supplying water to the burner 1. The heat exchanger 4 is arranged above the burner 1 for exchanging heat with the flue gas generated by the combustion of the burner 1. The water path of the heat exchanger 4 is connected and communicated with the water path of the burner 1. The water storage container is connected to the water outlet 1023 of the burner 1 for receiving the condensed water output from the water outlet 1023 of the burner 1.

[0124] The gas water heater according to the second aspect of the embodiment of the present utility model includes or uses the burner 1 according to the first aspect of the present utility model, and thus has its beneficial effects, that is, it can overcome the problem in the related art that condensed water falls into the flame holes 1012, and can avoid condensed water from falling into the flame holes 1012, which may affect the normal operation of the burner 1. The gas water heater of the embodiment of the present application works more stably, has fewer parts, and occupies less space.

[0125] In one embodiment, the gas water heater further includes a gas valve 8 and an air duct assembly 11. The air duct assembly 11 is connected between the outlet of the blower 2 and the burner 1. The output end of the gas valve 8 is connected to the air duct assembly 11. The blower 2 can mix air and gas and then introduce them into the burner body 101, and finally spray them out through the flame holes 1012 of the combustion plate into the combustion chamber 104. At this time, when the ignition needle assembly 1017 generates an electric spark in the combustion chamber 104, the gas-air mixture can be ignited and continuously and stably burned.

[0126] In one embodiment, the gas water heater further includes a controller 9. The controller 9 is preferably communicatively connected to the gas valve 8, the blower 2, and the ignition needle assembly 1017, and can be used to control the operation of the gas water heater.

[0127] In one embodiment, the gas water heater further includes an atomizer 6. A water storage container is formed in the atomizer 6. The atomizer 6 is used to atomize condensed water, and an exhaust port for discharging water mist is formed on the atomizer 6.

[0128] In the related art, since the condensed water needs to be discharged into the sewer, if the gas water heater is installed in the kitchen, the floor cabinet needs to be modified, and the condensed water is output into the sewer through a drain pipe. If the gas water heater is installed on the balcony, a floor drain needs to be installed on the balcony. Therefore, not only the installation process of the gas water heater is complicated, but also the aesthetics of the decoration layout will be affected.

[0129] In the embodiment of the present application, the atomizer 6 atomizes the condensed water into water vapor and then discharges it. Therefore, the condensed water can be output without installing a sewer and a floor drain, thereby simplifying the installation steps of the gas water heater and helping to improve the aesthetics of the decoration layout.

[0130] On this basis, in the related art, in order to improve the thermal efficiency of the gas water heater, the gas water heater generally includes a main heat exchanger and a secondary heat exchanger. After the gas burns, high-temperature flue gas at 800-1000 °C is generated. When the high-temperature flue gas flows through the main heat exchanger, heat is transferred to the main heat exchanger. Since the main heat exchanger is located above the burner, in order to avoid directly generating a large amount of condensed water above the burner, which may affect the normal operation of the burner, the thermal efficiency of the main heat exchanger is generally set to about 87%. After the flue gas exchanges heat with the main heat exchanger, it becomes low-temperature flue gas at about 140 °C - 160 °C.

[0131] When the low-temperature flue gas flows through the secondary heat exchanger, heat is released again. Moreover, since the flue gas temperature drops to 40°C - 60°C, the gaseous water is condensed into liquid water, and latent heat is released simultaneously. This part of the latent heat is absorbed by the secondary heat exchanger. The thermal efficiency of the secondary heat exchanger is generally 13% - 17%.

[0132] However, since the water temperature inside the secondary heat exchanger is about 20 degrees, the 20-degree water temperature is likely to reduce the flue gas temperature of 140°C - 160°C to the dew point (60°C - 80°C). At this time, a large amount of condensed water will be generated. When there is too much condensed water and the atomizer 6 cannot handle it in time, it is easy to cause the condensed water to backflow into the heat exchanger 4 and the burner 1, resulting in the failure of the burner 1. In addition, the condensed water remaining in the water heater is also likely to breed bacteria and even produce peculiar smells.

[0133] In the gas water heater according to the embodiment of the present application, a water collection channel 102 is provided at the burner main body 101, thereby allowing the thermal efficiency of the heat exchanger 4 to be set relatively high. The thermal efficiency of the heat exchanger 4 of the gas water heater according to the embodiment of the present application is about 94.5%. On this basis, the cover body 103 is provided to include an inner wall 1031 and an outer wall 1032, and a cavity 1033 is formed between the inner wall 1031 and the outer wall 1032. The water in the cavity 1033 can be used to exchange heat with the flame and high-temperature flue gas, thereby significantly reducing the heat loss at the position of the combustion chamber 104. By setting like this, the thermal efficiency at the cover body 103 is about 4% - 5%, wherein about 2% of the thermal efficiency comes from the latent heat of condensed water, and about 3% of the thermal efficiency comes from the recovery of heat loss. The thermal efficiency of the gas water heater according to the embodiment of the present application is about 98.5 - 99.5%.

[0134] That is to say, since the gas water heater according to the embodiment of the present application can reduce the heat loss at the position of the combustion chamber 104 through the cover body 103, a relatively high thermal efficiency is ensured without absorbing a large amount of latent heat of water vapor, and the amount of condensed water generated during the use of the gas water heater is greatly reduced. The amount of condensed water generated during the use of the gas water heater according to the embodiment of the present application is about one-tenth of that of a gas water heater including the main heat exchanger 4 and the secondary heat exchanger 4. Also, since the amount of condensed water generated by the gas water heater according to the embodiment of the present application is small, the atomizer 6 can fully atomize the water generated during the use of the gas water heater, thereby simplifying the installation steps of the gas water heater and improving the aesthetic appearance of the decoration layout.

[0135] In one embodiment, the gas water heater further includes a housing 10, a smoke exhaust hood 7, and a mist exhaust pipe 601. Among them, a blower 2, a burner 1, a heat exchanger 4, and an atomizer 6 are disposed inside the housing 10. The smoke exhaust hood 7 covers one side of the heat exchanger 4 away from the burner 1. A smoke exhaust pipe 701 is provided on the smoke exhaust hood 7, and the smoke exhaust pipe 701 passes through the housing 10 for exhausting flue gas. The mist exhaust pipe 601 is disposed inside the housing 10 and is connected between the air outlet of the atomizer 6 and the smoke exhaust pipe 701.

[0136] With such a design, it is possible to discharge the water mist by means of the existing pipelines of the gas water heater, avoiding adding dedicated pipelines to the housing 10, facilitating the installation of the gas water heater, reducing the installation workload, and at the same time helping to improve the aesthetics of the housing of the gas water heater.

[0137] As an alternative embodiment, in an embodiment not shown in one of the drawings, the smoke exhaust pipe 701 directly penetrates through the housing 10 and discharges the water mist outward.

[0138] In one embodiment, the burner 1 includes a burner main body 101 and a cover body 103 covering the burner main body 101. A burner water inlet joint 1013 and a burner water outlet joint 1014 are respectively provided on both sides of the burner main body 101. A cover body water inlet joint 1034 and a cover body water outlet joint 1035 are provided on the cover body 103. The water inlet pipe 3 is connected to the burner water inlet joint 1013, the burner water outlet joint 1014 is connected to the cover body water inlet joint 1034 of the cover body 103, and the cover body water outlet joint 1035 of the cover body 103 is connected to the cold side inlet of the heat exchanger 4.

[0139] With such an arrangement, the water input by the water inlet pipe 3 can sequentially pass through the burner main body 101, the cover body 103, and the heat exchanger 4, so as to obtain sufficient heat exchange.

[0140] As an alternative embodiment, the water inlet pipe 3 is connected to the heat exchanger 4, the cold side outlet of the heat exchanger 4 is connected to the cover body water inlet joint 1034, and the water storage joint of the cover body 103 is connected to the burner water inlet joint 1013. With such an arrangement, the cold water input from the outside can sequentially pass through the heat exchanger 4, the cover body 103, and the burner main body 101, and the temperature gradually increases. At the same time, the temperature of the flue gas at the heat exchanger 4, the cover body 103, and the burner main body 101 increases sequentially. With such an arrangement, it is possible to ensure that the heat capacity of the water matches during the heat exchange process with the flue gas, thereby obtaining a better heat exchange effect.

[0141] Specifically, during the use of the gas water heater according to the embodiment of the present application, when the combustion firepower of the gas water heater is less than 50%, the condensed water on the burner main body 101 will be discharged through the water collection channel 102 and the water outlet 1023 in sequence. In this state, the efficiency of the gas water heater reaches 98.5 - 99.5%.

[0142] When the combustion firepower of the gas water heater is greater than 50%, part of the condensed water is evaporated. When the firepower reaches 100%, about 90% of the condensed water will be heated and evaporated, which will cause a slight decrease in the thermal efficiency of the gas water heater. However, the overall efficiency is still greater than 94%, meeting the requirements of the national first-level energy efficiency standard. Also, since part of the condensed water is evaporated during this process, the water flowing into the atomizer 6 naturally becomes less, thereby reducing the working pressure of the atomizer 6, being able to reduce the working time and frequency of the atomizer 6, and extending its service life.

[0143] In summary, the burner 1 and the gas water heater of the embodiments of the present application can overcome the problem in the related art that condensed water falls into the flame holes 1012, can avoid condensed water from falling into the flame holes 1012, which may affect the normal operation of the burner 1. The burner 1 of the embodiments of the present application operates more stably, uses fewer parts, and occupies less space.

[0144] Although the embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A burner, characterized in that: include: A burner body (101), wherein a gas inlet (1011) and a fire hole (1012) are formed on the burner body (101), wherein the gas inlet (1011) is used to introduce gas, and the fire hole (1012) is connected to the gas inlet (1011); a water collecting flow channel (102), the water collecting flow channel (102) and the fire hole (1012) being arranged on the same side surface of the burner body (101) and spaced apart from the fire hole (1012), and being used to collect condensed water in the flue gas generated by combustion of the burner (1); A water outlet (1023) is formed on the burner body (101) and is connected to the water collecting channel (102) for discharging the condensed water.

2. The burner according to claim 1, characterized in that The burner (1) further comprises a cover body (103), the cover body (103) being arranged on the burner body (101), a smoke outlet being formed on the cover body (103), and a combustion chamber (104) being formed between the cover body (103) and the burner body (101); The water collection channel (102) further comprises: The first flow channel (1022) is arranged along the edge of the burner body (101) and is located inside the cover body (103); the first flow channel (1022) is connected to the water outlet (1023).

3. The burner according to claim 2, characterized in that Along the specified direction, the water collection channel (102) is inclined downward, and the water outlet (1023) is connected to the lowest point of the water collection channel (102).

4. The burner according to claim 2, characterized in that: The water collection channel (102) comprises: A plurality of second flow channels (1021), wherein the second flow channels (1021) are arranged in the first flow channel (1022) and connected to the first flow channel (1022) at both ends, the plurality of second flow channels (1021) extend along a first direction, the plurality of second flow channels (1021) are arranged at intervals along a second direction, the fire hole (1012) is arranged between two adjacent second flow channels (1021), and an angle is formed between the first direction and the second direction.

5. The burner according to claim 4, characterized in that Also includes: A burner water inlet joint (1013) and a burner water outlet joint (1014) are respectively arranged on both sides of the burner body (101); A plurality of heat exchange pipelines (1015) are arranged in the burner body (101), and the two ends thereof are respectively connected to the burner water inlet joint (1013) and the burner water outlet joint (1014).

6. The burner according to claim 5, characterized in that The heat exchange pipeline (1015) extends along the first direction and is arranged in a one-to-one correspondence with the second flow channel (1021).

7. The burner according to claim 5, characterized in that The cover body (103) further comprises: An inner wall (1031) is arranged around the combustion chamber (104); An outer wall (1032) is arranged around the inner wall (1031), and a closed cavity (1033) is formed between the inner wall (1031) and the outer wall (1032); A cover body water inlet joint (1034), which is disposed on the cover body (103) and is in communication with the cavity (1033); the cover body water inlet joint (1034) is connected to the burner water outlet joint (1014); The cover body water outlet joint (1035) is provided on the cover body (103) and is connected to the cavity (1033) and is used to output the water in the cavity (1033).

8. The burner according to any one of claims 1 to 7, characterized in that The burner body (101) comprises: The combustion plate has a plurality of gas inlets (1011) distributed on one side of the combustion plate, and a plurality of fire holes (1012) are arranged on the other side of the combustion plate and are arranged one-to-one corresponding to the gas inlets (1011).

9. A gas water heater, characterized in that: include: Fan (2); The burner (1) according to any one of claims 1 to 8, arranged at the air outlet of the fan (2); a water inlet pipe (3), connected to the water path of the burner (1) and used for supplying water to the burner (1); A heat exchanger (4) is arranged above the burner (1) and is used to exchange heat with the flue gas generated by the burner (1); a water channel of the heat exchanger (4) is connected to a water channel of the burner (1); A water storage container is connected to the water outlet (1023) of the burner (1) and is used to receive condensed water output from the water outlet (1023) of the burner (1).

10. The gas water heater according to claim 9, characterized in that: Also includes: An atomizer (6), wherein the water storage container is formed inside the atomizer (6), the atomizer (6) is used to atomize the condensed water, and an exhaust port for discharging water mist is formed on the atomizer (6).

11. The gas water heater according to claim 10, characterized in that: Also includes: A housing (10), wherein the fan (2), the burner (1), the heat exchanger (4) and the atomizer (6) are arranged in the housing (10); a smoke exhaust hood (7), which is arranged on a side of the heat exchanger (4) away from the burner (1); a smoke exhaust pipe (701) is provided on the smoke exhaust hood (7); the smoke exhaust pipe (701) passes through the shell (10) and is used to exhaust the smoke; The smoke exhaust pipe (601) is arranged in the housing (10) and connected between the air outlet of the atomizer (6) and the smoke exhaust pipe (701).

12. The gas water heater according to any one of claims 9 to 11, characterized in that: The burner (1) comprises a burner body (101) and a cover body (103) arranged on the burner body (101); a burner water inlet joint (1013) and a burner water outlet joint (1014) are respectively arranged on both sides of the burner body (101); a cover body water inlet joint (1034) and a cover body water outlet joint (1035) are arranged on the cover body (103); the water inlet pipe (3) is connected to the burner water inlet joint (1013); the burner water outlet joint (1014) is connected to the cover body water inlet joint (1034) of the cover body (103); and the cover body water outlet joint (1035) of the cover body (103) is connected to the cold side inlet of the heat exchanger (4).

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