CN108006632A - Burner and there is its gas heater - Google Patents

Abstract

The invention discloses a burner and a gas water heater with the burner. The burner includes at least one combustion unit, a primary air conditioning board and a secondary air conditioning board. The combustion unit includes a burner housing and a rectifying device. The first rich combustion chamber, the second rich combustion chamber and the lean combustion chamber, the burner housing is provided with a rich combustion injection inlet, a light combustion injection inlet, a first rich combustion flame port, a second rich combustion flame port and a light combustion opening ; The rectification device is set in the light combustion opening, and the primary air conditioning plate is set on the front side of the rich combustion injection inlet and the light combustion injection inlet to adjust the air injection volume. The secondary air conditioning plate is arranged below the combustion unit, and the primary air conditioning plate extends downwards and defines a pressure equalization chamber with the secondary air conditioning plate. According to the burner of the embodiment of the present invention, the structural stability of the combustion flame can be improved, and the emission of nitrogen oxides in the flue gas can be reduced.

Description

Burner and gas water heater having same

technical field

The invention relates to the technical field of household appliances, in particular to a burner and a gas water heater with the burner.

Background technique

Due to the deteriorating ecological environment, human health is increasingly endangered. People pay more and more attention to air pollution. Various industries are responding to the country's call to save energy and reduce emissions. With the rapid development of urban gas, gas water heaters are becoming more and more popular because of their convenience and quickness. However, in the existing gas-fired water heaters, the burning of gas will inevitably produce harmful gases, especially the high content of nitrogen oxides in the flue gas, which seriously pollutes the environment.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the present invention proposes a burner, which can reduce the emission of nitrogen oxides in flue gas and reduce environmental pollution.

The invention also proposes a gas water heater with the burner.

The burner according to the embodiment of the first aspect of the present invention includes at least one combustion unit, and the combustion unit includes: a burner housing, and the burner housing has a first rich combustion chamber, a second rich combustion chamber and a lean combustion chamber. chamber, the burner housing is provided with a rich combustion injection inlet communicating with the first rich combustion chamber and the second rich combustion chamber, a lean combustion injection inlet communicating with the lean combustion chamber, and The first rich combustion flame port communicated with the first rich combustion chamber, the second rich combustion flame port communicated with the second rich combustion chamber, and the lean combustion opening communicated with the lean combustion chamber; rectifying device, the rectifying device It is arranged in the opening of the light combustion and the rectification device is provided with a plurality of light combustion flame ports communicated with the light combustion chamber, the first rich combustion flame port and the second rich combustion flame port are respectively located in the multiple Both sides of a light burning flame port;

A primary air regulating plate, the primary air regulating plate is arranged on the front side of the inlet of the rich burn injector and the inlet of the lean burn injector to adjust the amount of air injection. A secondary air conditioning plate, the secondary air conditioning plate is arranged below the combustion unit, the primary air conditioning plate extends downwards and defines a pressure equalization chamber with the secondary air conditioning plate.

Therefore, according to the burner of the embodiment of the present invention, the first rich combustion flame port and the second rich combustion flame port of the combustion unit are respectively located on both sides of a plurality of light combustion flame ports, so as to form a light combustion flame in the middle and a rich combustion flame on both sides. The stable flame structure of the flame achieves the purpose of reducing the flame temperature and controlling the emission of nitrogen oxides in the flue gas after combustion.

And the primary air conditioning plate is arranged on the front side of the rich combustion injection inlet and the lean combustion injection inlet to adjust the air injection amount. The secondary air conditioning plate is arranged below the combustion unit, and the primary air conditioning plate extends downwards and defines a pressure equalization chamber with the secondary air conditioning plate. In this way, the air generated by the blower of the burning water heater flows to the rich combustion injection inlet and the light combustion injection inlet through the pressure equalization chamber, so that the amount of primary air entering the rich combustion injection inlet and the lean combustion injection inlet is more uniform, so as to further control The structural stability of the combustion flame improves the combustion effect and reduces the emission of nitrogen oxides.

In addition, the burner according to the embodiment of the present invention may also have the following additional technical features:

According to some embodiments of the present invention, a first blind passage and a second blind passage are respectively defined between the rectification device and the two side walls of the lean combustion opening, and the first blind passage is located between the first rich combustion flame port and the first blind passage. Between the plurality of light combustion flame ports, the second blind passage is located between the second rich combustion flame port and the plurality of light combustion flame ports.

According to some embodiments of the present invention, the maximum width of the light combustion flame port is W3, and the height of the rectifying device is H, wherein W3/H=0.03˜0.30.

According to some embodiments of the present invention, the ratio of theoretical air volume to gas volume for complete combustion of gas is Φ _S , and the mixing ratio of air volume and gas volume at the inlet of rich combustion is Φ _R , where Φ _R /Φ _S = 0.5 to 0.8.

According to some embodiments of the present invention, the ratio of theoretical air volume to gas volume for complete combustion of gas is Φ _S , and the mixing ratio of air volume and gas volume at the light combustion injection inlet is Φ _L , where Φ _L /Φ _S = 1.5 to 2.0.

According to some embodiments of the present invention, the burner housing includes: a first light combustion shell portion and a second light combustion shell portion, the first light combustion shell portion is connected to the second light combustion shell portion and jointly defining the lean combustion cavity and the lean combustion opening, the rectifying device being disposed between the first and second lean combustion shell portions and at the lean combustion opening; the first a rich combustion shell portion and a second rich combustion shell portion, the first rich combustion shell portion is connected to the first lean combustion shell portion and is located outside the first lean combustion shell portion, the first rich combustion shell portion part and the first lean combustion shell part jointly define the first rich combustion chamber and the first rich combustion flame port, and the second rich combustion shell part is connected to the second light combustion shell part and is located at the The outer side of the second lean combustion shell part, the second rich combustion shell part and the second lean combustion shell part jointly define the second rich combustion chamber and the second rich combustion flame port.

Optionally, the burner housing further includes: a plurality of connecting pieces, the two ends of each connecting piece are respectively connected with the first rich combustion shell part and the second rich combustion shell part, and a plurality of The connecting piece divides each of the first rich combustion port, the second rich combustion port and the lean combustion port into multiple sections.

Optionally, the burner housing includes: a lean burn ejector connected to the first lean burn shell portion and the second light burn shell portion, the light burn injector The injection port is set on the lean burn ejector; the rich burn injector is connected with the first rich burn shell part and the second rich burn shell part and is connected with the first rich burn shell part. The combustion cavity communicates with the second rich combustion cavity, the rich burn injector is located above the lean burn injector, and the rich burn injector inlet is arranged on the rich burn injector.

According to some embodiments of the present invention, the combustion unit further includes: a rich combustion nozzle for supplying gas to the rich combustion injection inlet, the rich combustion nozzle corresponds to the rich combustion injection inlet; A lean combustion nozzle of gas is provided to the lean combustion injection inlet, and the lean combustion nozzle corresponds to the lean combustion injection inlet.

Optionally, the cross-sectional area S3 of the gas injection port of the rich combustion nozzle and the cross-sectional area S4 of the gas injection port of the lean combustion nozzle satisfy: S3/S4=0.25˜0.65.

According to some embodiments of the present invention, there are multiple combustion units arranged along the width direction of the combustion units.

According to the embodiment of the second aspect of the present invention, the gas water heater has the burner of the above embodiment.

Since the burner according to the above embodiment of the present invention has the above technical effect, the gas water heater in the embodiment of the present invention also has the above technical effect, that is, the gas water heater according to the embodiment of the present invention, by setting the burner in the above embodiment, thus It can improve the stability of the flame structure, reduce the temperature of the combustion flame, and reduce the emission of nitrogen oxides in the flue gas of the gas water heater.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

Fig. 1 is a structural schematic diagram of an angle of a combustion unit of a burner according to an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of another angle of a combustion unit of a burner according to an embodiment of the present invention;

Fig. 3 is a sectional view along line A-A in Fig. 2;

4 is a top view of a combustion unit of a burner according to an embodiment of the present invention;

5 is an exploded view of a combustion unit of a burner according to an embodiment of the present invention;

6 is a schematic structural view of a combustion unit of a burner according to another embodiment of the present invention;

Fig. 7 is a sectional view along line B-B among Fig. 6;

Fig. 8 is an enlarged view of part C in Fig. 7;

Fig. 9 is a schematic structural view of a burner according to an embodiment of the present invention;

10 is a vertical cross-sectional view of a burner according to an embodiment of the present invention;

11 is a horizontal cross-sectional view of a burner according to an embodiment of the present invention;

Fig. 12 is a sectional view taken along line D-D in Fig. 11 .

Reference signs:

100: burner;

1: Combustion unit;

11: burner housing, 111: first rich combustion shell, 1111: first rich combustion chamber, 112: second rich combustion shell, 1121: second rich combustion chamber, 113: first light combustion shell, 114: second light combustion shell, 1141: light combustion chamber, 115: light combustion opening, 116: first blind passage, 117: second blind passage, 118: first dense combustion flame port, 119: second dense combustion flame port;

12: light burning ejector, 121: light burning ejector entrance;

13: rich combustion ejector, 131: rich combustion ejector inlet;

14: rectification device, 141: light combustion flame port;

15: rich combustion nozzle;

16: light combustion nozzle;

17: connecting piece;

2: Primary air conditioning board, 21: Pressure equalization chamber;

3: Secondary air conditioning board.

Detailed ways

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, Unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

A burner 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings;

1-12, the burner 100 according to the embodiment of the present invention may include at least one combustion unit 1, and each combustion unit 1 includes a burner 100 housing 11, a straightening device 14, a primary air conditioning plate 2 and two Secondary air conditioning board 3.

The housing 11 of the burner 100 has a first rich combustion chamber 1111, a second rich combustion chamber 1121 and a light combustion chamber 1141, and the housing 11 of the burner 100 is provided with the first rich combustion chamber 1111 and the second rich combustion chamber 1121 The rich combustion injection inlet 131 communicated with the lean combustion injection inlet 121 communicated with the lean combustion chamber 1141, the first rich combustion flame port 118 communicated with the first rich combustion chamber 1111, the second rich combustion chamber 1121 communicated with the second The rich combustion flame port 119 and the light combustion opening 115 communicating with the light combustion chamber 1141, the rectification device 14 is arranged in the light combustion opening 115 and the rectification device 14 is provided with a plurality of light combustion flame ports 141 communicating with the light combustion chamber 1141, the first The rich combustion flame port 118 and the second rich combustion flame port 119 are respectively located on both sides of the plurality of lean combustion flame ports 141 .

In other words, the burner 100 may include one or more combustion units 1 , for example, the burner 100 may include a plurality of combustion units 1 , and the plurality of combustion units 1 are arranged side by side and arranged along the width direction of the combustion units 1 . The width direction is the left-right direction as shown in FIG. 5 and FIG. 7 . Each combustion unit 1 includes a burner 100 housing 11 and a rectification device 14 , and the rectification device 14 is arranged in the burner 100 housing 11 .

The housing 11 of the burner 100 defines a first rich combustion chamber 1111, a second rich combustion chamber 1121 and a light combustion chamber 1141, and the housing 11 of the burner 100 is provided with a rich combustion inlet 131 and a light combustion inlet 121. , the first rich combustion flame port 118, the second rich combustion flame port 119 and the light combustion opening 115, the rich combustion injection inlet 131 is used to introduce air for rich combustion, and the light combustion injection inlet 121 is used for light combustion to introduce air, in conjunction with Fig. 1- As shown in FIG. 3 and FIG. 6 , the rich-burn injection inlet 131 is located above the lean-burn injection inlet 121 .

The rich combustion injection inlet 131 communicates with the first rich combustion chamber 1111 and the second rich combustion chamber 1121 respectively, the first rich combustion chamber 1111 communicates with the first rich combustion flame port 118, and the second rich combustion chamber 1121 communicates with the second rich combustion flame port 119 communicates, the lean combustion inlet 121 communicates with the lean combustion chamber 1141 and the lean combustion chamber 1141 communicates with the lean combustion opening 115 .

In this way, the air is introduced from the rich combustion injection port 131 and mixed with the gas to form a rich combustion gas. The mixed rich combustion gas can enter the first rich combustion chamber 1111 and the second rich combustion chamber 1121 respectively, and respectively lead to the first rich combustion chamber 1111 and the second rich combustion chamber 1121. A rich combustion flame port 118 and a second rich combustion flame port 119. The air introduced by the light combustion introduction inlet 121 is mixed with gas to form a light combustion gas, which flows to the light combustion chamber 1141 . As shown in Figures 5-8, the rectification device 14 is arranged in the light combustion opening 115, and the rectification device 14 is provided with a plurality of light combustion flame ports 141, and the light combustion chamber 1141 communicates with a plurality of light combustion flame ports 141 respectively, and the light combustion gas It can lead to a plurality of light combustion flame ports 141 .

As shown in Fig. 4, Fig. 5, Fig. 7 and Fig. 8, the first rich combustion flame port 118 and the second light combustion flame port 141 are respectively arranged on both sides of the light combustion opening 115, and a plurality of light combustion flame ports 141 are located at the first rich combustion port. Between the flame port 118 and the second rich combustion flame port 119, like this, the top of each combustion unit 1 can form the structure that the center is a weak combustion flame port 141, and both sides are rich combustion flame ports. That is to say, the combustion unit 1 can form a flame structure with a thin flame in the middle and thick flames on both sides during combustion, thereby improving the stability of the flame, reducing the temperature of the combustion flame, and achieving the purpose of controlling the emission of nitrogen oxides in the flue gas.

As shown in FIGS. 9-12 , the primary air conditioning plate 2 is arranged on the front side of the rich combustion inlet 131 and the lean combustion inlet 121 to adjust the amount of air injection. Thus, the air volume introduced into the rich combustion injection inlet 131 and the lean combustion injection inlet 121 can be adjusted through the primary air adjustment plate 2, thereby further controlling the ratio of the air volume to the gas volume of the rich combustion injection inlet 131 and the ratio of the lean combustion injection inlet 131. The ratio of the amount of air injected into the port 121 to the amount of gas.

The secondary air conditioning plate 3 is arranged below the combustion unit 1 , and the primary air conditioning plate extends downwards and defines a pressure equalization chamber 21 between the secondary air conditioning plate 3 and the secondary air conditioning plate 3 . Specifically, the primary air conditioning plate 2 is arranged on the front side of the rich combustion injection inlet 131 and the lean combustion injection inlet 121 to adjust the amount of air injection, and the secondary air conditioning plate 3 is arranged under the combustion unit 1 to adjust the combustion chamber. Air volume, the lower end of the primary air conditioning plate 2 extends downward and defines a pressure equalizing chamber 21 with the secondary air regulating plate 3, so that the air generated by the blower of the burning water heater flows through the pressure equalizing chamber 21 to the rich combustion injection inlet 131 and the light combustion injection inlet 121, so that the amount of primary air entering the rich combustion injection inlet 131 and the light combustion injection inlet 121 is more uniform to improve the combustion effect.

Thus, according to the burner 100 of the embodiment of the present invention, the first rich combustion flame port 118 and the second rich combustion flame port 119 of the combustion unit 1 are respectively located on both sides of a plurality of light combustion flame ports 141, so as to form a light combustion flame in the middle, The two sides are stable flame structures with dense combustion flames, so as to reduce the flame temperature and control the emission of nitrogen oxides in the flue gas after combustion.

And the primary air conditioning plate 2 is arranged on the front side of the rich combustion injection inlet 131 and the lean combustion injection inlet 121 to adjust the air injection amount. The secondary air conditioning plate 3 is arranged below the combustion unit 1 , and the primary air conditioning plate 2 extends downward and defines a pressure equalization chamber 21 between the secondary air conditioning plate 3 and the secondary air conditioning plate 3 . In this way, the air produced by the blower of the burning water heater flows to the rich combustion injection inlet 131 and the lean combustion injection inlet 121 through the pressure equalization chamber 21, so that the amount of primary air entering the rich combustion injection inlet 131 and the lean combustion injection inlet 121 is more Uniformity, to further control the structural stability of the combustion flame, to improve the combustion effect and reduce the emission of nitrogen oxides.

In some embodiments of the present invention, a first blind passage 116 and a second blind passage 117 may be defined between the straightening device 14 and the two side walls of the lean combustion opening 115, and the first blind passage 116 is located between the first rich combustion flame port 118 and the multiple Between the two light combustion flame ports 141, the second blind passage 117 is located between the second rich combustion flame port 119 and the plurality of light combustion flame ports 141. As shown in Figures 7 and 8, the rectification device 14 is arranged in the light combustion opening 115 and is connected to the two side walls of the light combustion opening 115, and defines a first blind passage 116 and a second blind passage 117 with the two side walls respectively, Neither the first blind passage 116 nor the second blind passage 117 communicates with the light combustion chamber 1141 . The first rich combustion flame port 118 and a plurality of light combustion flame ports 141 can be spaced apart by the first blind passage 116, and the second rich combustion flame port 119 can be separated from a plurality of light combustion flame ports 141 by the second blind passage 117, so that the flame The structure is more stable, and the emission of nitrogen oxides in the flue gas is effectively controlled.

Optionally, as shown in FIG. 8 , the top surface of the outer wall of the first blind passage 116 is flush with the top surface of the outer wall of the second blind passage 117 and higher than the top surface of the straightening device 14 , and the top surface of the first rich combustion flame port 118 The top surface of the outer sidewall is flush with the top surface of the outer sidewall of the second rich combustion flame port 119 and higher than the top surface of the outer sidewall of the first blind passage 116 and the top surface of the outer sidewall of the second blind passage 117, the first blind passage 116 The top surface of the top surface of the outer side wall and the top surface of the second blind passage 117 and the top surface of the rectification device 14 are respectively H1, the top surface of the outer side wall of the first rich combustion flame port 118 and the second rich combustion flame port 119 The height difference between the top surface of the outer wall and the top surface of the rectification device 14 is H2, wherein H2≥H1. Therefore, it is beneficial to control the air flow stability of the rich combustion flame port and the lean combustion flame port 141, thereby improving the stability of the combustion flame.

Preferably, H2 and H1 can satisfy H2>H1, so as to further ensure the flame stability when the lean combustion port 141 and the rich combustion port burn, so as to reduce the emission of nitrogen oxides in the flue gas.

Advantageously, as shown in Figure 8, the maximum width of the first blind passage 116 and the maximum width of the second blind passage 117 can be equal and be W2, the maximum width of the first rich combustion flame port 118 is equal to the maximum width of the second rich combustion flame port 119 And is W1, wherein, W2≥W1. Thereby further ensuring the structural stability of the combustion flame. Specifically, as shown in Figure 7 and Figure 8, the maximum width of the first rich combustion flame port 118 is the maximum width of the narrow side of the first rich combustion flame port 118 along the left and right direction, and the maximum width of the second rich combustion flame port 119 is the second The maximum narrow side width of the rich combustion flame port 119 along the left and right direction. The maximum width of the first blind passage 116 and the maximum width of the second blind passage 117 are the maximum narrow side widths of the first blind passage 116 and the second blind passage 117 along the left and right directions. The maximum narrow side width of the first blind passage 116 and the second blind passage 117 is equal and is W2, the maximum narrow side width of the first rich combustion flame port 118 and the second rich combustion flame port 119 is equal and is W1, the first blind passage 116 and the second blind passage The maximum narrow side width W2 of 117 is greater than or equal to the maximum narrow side width W1 of the first rich combustion flame port 118 and the second rich combustion flame port 119 .

In some embodiments of the present invention, the maximum width of the lean combustion flame port 141 may be W3, and the height of the straightening device 14 may be H, wherein W3/H=0.03˜0.30. Specifically, as shown in Fig. 4 and Fig. 5, the rectification device 14 may include a plurality of rectification plates, and a plurality of slit-type passages are formed between the plurality of rectification plates, and a plurality of light combustion flame ports 141 are formed in each slit-type passage Among them, the maximum width W3 of the light combustion flame port 141 is the maximum narrow side width along the left and right direction of the top opening of each slit-shaped passage, and the height H of the rectification device 14 is the height of each slit-shaped passage. Preferably, W3/H=0.05˜0.20. Thereby further ensuring the structural stability of the rich combustion flame and the lean combustion flame.

In some embodiments of the present invention, the ratio of the theoretical air volume to the gas volume for complete combustion of the gas may be Φ _S , and the mixing ratio of the air volume and the gas volume at the inlet 131 for rich combustion may be Φ _R , where Φ _R / _ΦS = 0.5 to 0.8. Φ _R /Φ _S represents the primary air rate of the rich combustion. By designing the ratio of the entrance area of the rich combustion injection inlet 131 to the lean combustion injection inlet 121, the primary air rate of the rich combustion and the lean combustion can be adjusted, so that the gas and The air is well mixed and has a good combustion ratio to form a stable flame structure and reduce the emission of nitrogen oxides in the flue gas.

In some embodiments of the present invention, the ratio of the theoretical air volume to the gas volume for complete combustion of the gas can be Φ _S , and the mixing ratio of the air volume and the gas volume at the light combustion inlet 121 can be Φ _L , where Φ _L / _Φs = 1.5 to 2.0. Φ _R /Φ _S is the primary air rate of the lean combustion. By designing the ratio of the entrance area of the rich combustion injection inlet 131 to the lean combustion injection inlet 121, the primary air rate of the rich combustion and the lean combustion can be adjusted, so that the gas and The air is well mixed and has a good combustion ratio to form a stable flame structure and reduce the emission of nitrogen oxides in the flue gas.

In some embodiments of the present invention, as shown in FIG. 5 , FIG. 7 and FIG. 8 , the burner 100 housing 11 may include a first lean combustion shell portion 113 and a second lean combustion shell portion 114 and a first rich combustion shell portion. part 111 and the second rich combustion shell part 112, the first light combustion shell part 113 is connected with the second light combustion shell part 114 and jointly define the light combustion cavity 1141 and the light combustion opening 115, and the rectification device 14 is arranged in the first light combustion shell part 114 Between the shell portion 113 and the second lean burn shell portion 114 and at the lean burn opening 115 .

The first rich combustion shell portion 111 is connected to the first lean combustion shell portion 113 and is located outside the first lean combustion shell portion 113. The first rich combustion shell portion 111 and the first lean combustion shell portion 113 jointly define the first rich combustion shell portion 113. Cavity 1111 and the first rich combustion flame port 118, the second rich combustion shell part 112 is connected with the second light combustion shell part 114 and is located outside the second light combustion shell part 114, the second rich combustion shell part 112 is connected with the second light combustion shell part 114 The shell portion 114 jointly defines a second rich combustion chamber 1121 and a second rich combustion flame port 119 .

As shown in Figures 7 and 8, the first rich combustion flame port 118 and the second rich combustion flame port 119 are respectively located on both sides of the light combustion opening 115, and the rectification device 14 is arranged at the light combustion opening 115 place and the rectification device 14 is provided with multiple A light combustion flame port 141, a plurality of light combustion flame ports 141 are located on the top of the rectification device 14, the first rich combustion flame port 118 and the second rich combustion flame port 119 are respectively located on both sides of a plurality of light combustion flame ports 141, thereby facilitating the formation of a middle The stable flame structure of light combustion flame and thick combustion flame on both sides can improve the stability of the flame, reduce the temperature of the flame and reduce the emission of nitrogen oxides.

Advantageously, the housing 11 of the burner 100 can also include a plurality of connecting pieces 17, and the two ends of each connecting piece 17 are respectively connected with the first rich combustion shell portion 111 and the second rich combustion shell portion 112, and the plurality of connecting pieces 17 Each of the first rich combustion port 118, the second rich combustion port 119 and the lean combustion port 141 is divided into multiple sections. Thus, the lean combustion flame and the rich combustion flame can be divided into multiple sections, thereby increasing the heat dissipation area of the flame and reducing the flame temperature.

Optionally, the housing 11 of the burner 100 may also include a lean burner injector 12 and a rich burner injector 13, and the lean burner injector 12 is connected to the first lean burner shell part 113 and the second lean burner shell part 114 , the lean burner injection inlet 121 is located on the lean burner 100; the rich burner injector 13 is connected with the first rich burner shell portion 111 and the second rich burner shell portion 112 and is connected with the first rich burner chamber 1111 and the second rich burner cavity 1111 respectively The rich combustion cavity 1121 is connected, the rich combustion ejector 13 is located above the lean combustion ejector 12 , and the rich combustion injection inlet 131 is arranged on the rich combustion ejector 13 . Thus, the gas and the introduced air can be guided to the first rich combustion chamber 1111 and the second rich combustion chamber 1121 through the rich combustion injector 13, and the gas and air are separated in the first rich combustion chamber 1111 and the second rich combustion chamber 1121. Internal mixing, the mixed gas passes to the first rich combustion flame port 118 and the second rich combustion flame port 119 . At the same time, the gas and the introduced air can be guided to the lean combustion chamber 1141 through the lean combustion injector 12 , and the gas and air can be mixed in the lean combustion chamber 1141 , and the mixed gas and air lead to the lean combustion flame port 141 .

In some embodiments of the present invention, the combustion unit 1 can also include a rich burn nozzle 15 and a lean burn nozzle 16, the rich burn nozzle 15 can be used to provide fuel gas to the rich burn injection inlet 131, and the lean burn nozzle 16 can be used to supply gas to the lean burn injection port 131. The injection inlet 121 provides the lean combustion nozzle 16 of gas, the rich combustion nozzle 15 communicates with the inlet of the rich combustion injector 13 , and the lean combustion nozzle 16 communicates with the lean combustion injection inlet 121 . Thus, gas is injected into the rich combustion injection inlet 131 through the rich combustion nozzle 15 , and the gas is mixed with the air introduced by the rich combustion injector 13 and passes into the first rich combustion chamber 1111 and the second rich combustion chamber 1121 . Gas can be injected into the lean combustion injection inlet 121 through the lean combustion nozzle 16 , and the gas is mixed with the air introduced by the lean combustion injector 12 and leads to the lean combustion cavity 1141 .

Optionally, the cross-sectional area S3 of the gas injection port of the rich combustion nozzle 15 and the cross-sectional area S4 of the gas injection port of the lean combustion nozzle 16 may satisfy: S3/S4=0.25˜0.65. That is to say, the cross-sectional area of the gas injection port of the rich combustion nozzle 15 is 0.25～0.65 times of the cross-sectional area of the gas injection port of the lean combustion nozzle 16. The proportion of the cross-sectional area, so that the ratio of the gas volume and the air volume of the rich combustion and the lean combustion can be controlled, so that the air volume introduced by the lean combustion injection inlet 121 is the same as the gas volume injected by the lean combustion nozzle 16, and the rich combustion injection There is a good ratio between the amount of air introduced by the inlet 131 and the amount of gas injected by the rich burn nozzle 15, so as to make the rich burn and rich burn burn more fully and reduce the emission of nitrogen oxides.

Further, the cross-sectional area S1 of the rich-burn injection inlet 131 and the cross-sectional area S2 of the lean-burn injection inlet 121 satisfy: S1/S2=0.20˜0.40. In other words, the cross-sectional area of the rich-burn injection inlet 131 is S1, and the cross-sectional area of the lean-burn injection inlet 121 is S2, and S1 and S2 can satisfy: S1/S2=0.20-0.40, that is, the The cross-sectional area S1 is 0.20 to 0.40 times the cross-sectional area S2 of the lean combustion inlet 121 .

Thus, the amount of air introduced from the rich-burn injector 131 and the lean-burn injector 121 can be controlled, so that the air introduced from the rich-burn injector 13 and the air introduced from the lean-burn injector 12 are respectively Form a good mixing ratio with gas to control the primary air rate of rich combustion or light combustion, the primary air rate is the ratio of the air volume to the gas volume when the gas and air are pre-mixed, and the theoretical air that reacts with the complete combustion of the gas The ratio of fuel volume to air ratio. Therefore, the stability of the flame structure can be effectively improved to further reduce the emission of nitrogen oxides in the flue gas and reduce environmental pollution.

A specific example of the burner 100 according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, it should be understood that the following description is only illustrative and should not be construed as a limitation to the embodiment of the present invention.

1-12, the burner 100 according to the embodiment of the present invention may include a plurality of combustion units 1, a primary air conditioning plate 2 and a secondary air conditioning plate 3, and a plurality of combustion units 1 are arranged side by side and along the combustion unit 1 in the width direction.

Specifically, each combustion unit 1 includes a burner 100 housing 11 , a straightening device 14 , a rich burn injector 13 , a lean burn injector 12 , a rich burn nozzle 15 and a lean burn nozzle 16 . As shown in FIG. 5 , FIG. 7 and FIG. 8 , the burner 100 housing 11 includes a first lean combustion shell portion 113 and a second lean combustion shell portion 114 as well as a first rich combustion shell portion 111 and a second rich combustion shell portion 112 , the first light combustion shell part 113 is connected with the second light combustion shell part 114 and jointly defines the light combustion cavity 1141 and the light combustion opening 115, and the rectification device 14 is arranged on the first light combustion shell part 113 and the second light combustion shell part 114 and located at the light burn opening 115.

The first rich combustion shell portion 111 is connected to the first lean combustion shell portion 113 and is located outside the first lean combustion shell portion 113. The first rich combustion shell portion 111 and the first lean combustion shell portion 113 jointly define the first rich combustion shell portion 113. Cavity 1111 and the first rich combustion flame port 118, the second rich combustion shell part 112 is connected with the second light combustion shell part 114 and is located outside the second light combustion shell part 114, the second rich combustion shell part 112 is connected with the second light combustion shell part 114 The shell portion 114 jointly defines a second rich combustion chamber 1121 and a second rich combustion flame port 119 .

The first rich combustion flame port 118 and the second rich combustion flame port 119 are respectively located on both sides of the light combustion opening 115, the rectification device 14 is arranged at the light combustion opening 115 and the rectification device 14 is provided with a plurality of light combustion flame ports 141, and a plurality of light combustion flame ports 141 are arranged on the rectification device 14. The combustion flame port 141 is arranged at the top of the rectification device 14, and the first rich combustion flame port 118 and the second rich combustion flame port 119 are respectively located on both sides of a plurality of light combustion flame ports 141, thereby facilitating the formation of a middle light combustion flame and thick combustion flames on both sides. The stable flame structure can improve the stability of the flame, reduce the flame temperature and reduce the emission of nitrogen oxides.

The light combustion ejector 12 is connected with the first light combustion shell part 113 and the second light combustion shell part 114, the light combustion injection inlet 121 is arranged on the light burner 100, the rich combustion ejector 13 is connected with the first rich combustion shell part 111 is connected with the second rich combustion shell part 112 and communicated with the first rich combustion chamber 1111 and the second rich combustion chamber 1121 respectively, the rich combustion ejector 13 is located above the lean combustion ejector 12, and the rich combustion ejector 131 Set on the rich burn ejector 13. Thus, the gas and the introduced air can be guided to the first rich combustion chamber 1111 and the second rich combustion chamber 1121 through the rich combustion injector 13, and the gas and air can be mixed and lead to the first rich combustion flame port 118 and the second rich combustion chamber 118. Rich burning flame mouth 119. At the same time, the gas and the introduced air can be guided to the light combustion chamber 1141 through the light combustion injector 12 , and the gas and air are mixed and lead to the light combustion flame port 141 .

The rich combustion nozzle 15 can be used to provide fuel gas to the rich combustion injection inlet 131, and the lean combustion nozzle 16 can be used to provide the lean combustion nozzle 16 of fuel gas to the lean combustion injection inlet 121, and the rich combustion nozzle 15 is connected to the rich combustion injector 13 inlet. Corresponding to and communicating with, the lean combustion nozzle 16 is corresponding to and communicating with the lean combustion introduction inlet 121 . Thus, the gas is injected into the rich combustion injection inlet 131 through the rich combustion nozzle 15 , and the gas is mixed with the air introduced by the rich combustion injector 13 and passes into the first rich combustion chamber 1111 and the second rich combustion chamber 1121 . Gas can be injected into the lean combustion injection inlet 121 through the lean combustion nozzle 16 , and the gas is mixed with the air introduced by the lean combustion injector 12 and leads to the lean combustion chamber 1141 .

Wherein, the cross-sectional area S1 of the rich-burn injection inlet 131 and the cross-sectional area S2 of the lean-burn injection inlet 121 satisfy: S1/S2=0.20～0.40, and the cross-sectional area S3 of the gas injection port of the rich-burn nozzle 15 is related to the cross-sectional area S2 of the lean-burn injection inlet 121. The cross-sectional area S4 of the gas injection port of the nozzle 16 satisfies: S3/S4=0.25˜0.65. Thus, the ratio of the gas volume to air at the rich combustion injection port 131 and the ratio of the air volume to the gas volume at the lean combustion injection port 121 can be controlled, thereby controlling the primary air rate of the rich combustion and the primary air rate of the lean combustion.

The ratio of the theoretical air volume to gas volume for complete combustion of gas can be Φ _S , the mixing ratio of the air volume and gas volume at the inlet 131 for rich combustion is Φ _R , and the mixture ratio of air volume and gas volume for light combustion injection inlet 121 is The ratio is Φ _L , the primary air ratio of rich combustion is Φ _R /Φ _S and satisfies Φ _R /Φ _S = 0.5 ~ 0.8, the primary air ratio of lean combustion is Φ _L /Φ _S and satisfies Φ _L /Φ _S = 1.5 ~ 2.0 . So that the gas and air are fully mixed and have a good combustion ratio to form a stable flame structure and reduce the emission of nitrogen oxides in the flue gas.

As shown in Figures 7 and 8, a first blind passage 116 and a second blind passage 117 can be defined between the rectification device 14 and the two side walls of the lean combustion opening 115, and the first blind passage 116 is located between the first rich combustion flame port 118 and the multiple Between the two light combustion flame ports 141, the second blind passage 117 is located between the second rich combustion flame port 119 and the plurality of light combustion flame ports 141.

The top surface of the outer side wall of the first blind passage 116 is flush with the top surface of the outer side wall of the second blind passage 117 and higher than the top surface of the rectification device 14, and the top surface of the outer side wall of the first rich combustion flame port 118 is the same as the second rich combustion burner. The top surface of the outer side wall of the flame port 119 is flush and higher than the top surface of the outer side wall of the first blind passage 116 and the top surface of the outer side wall of the second blind passage 117, and the top surface of the outer side wall of the first blind passage 116 and the second blind passage 117 The height difference between the top surface of the outer sidewall of the outer wall and the top surface of the rectifying device 14 is H1 respectively, and the top surface of the outer side wall of the first rich combustion flame port 118 and the top surface of the outer side wall of the second rich combustion flame port 119 are respectively connected with the rectification device 14 The height difference of the top surface is H2, the maximum width of the first blind passage 116 is equal to the maximum width of the second blind passage 117 and can be W2, the maximum width of the first rich combustion flame port 118 is equal to the maximum width of the second rich combustion flame port 119 And it can be W1, wherein, H2≥H1, W2≥W1. Therefore, it is beneficial to control the air flow stability of the rich combustion flame port and the lean combustion flame port 141, thereby improving the stability of the combustion flame.

The maximum width of the light combustion flame port 141 may be W3, and the height of the straightening device 14 may be H, wherein W3/H=0.03˜0.30. Preferably, W3/H=0.05˜0.20. Thereby further ensuring the structural stability of the rich combustion flame and the lean combustion flame.

The primary air conditioning plate 2 can be arranged on the front side of the rich combustion injection inlet 131 and the lean combustion injection inlet 121 of the plurality of combustion units 1 to adjust the amount of air injection. The air volume introduced by the rich combustion injection inlet 131 and the lean combustion injection inlet 121 of each combustion unit 1 can be adjusted through the primary air adjustment plate 2, thereby further controlling the ratio of the air volume and the gas volume of the rich combustion injection inlet 131 and The ratio of the amount of air and the amount of gas injected into the inlet 121 for lean combustion.

The secondary air conditioning plate 3 is arranged below the combustion unit 1 to adjust the air volume of the combustion chamber. The primary air conditioning plate 2 extends downwards and defines a pressure equalization chamber 21 with the secondary air conditioning plate 3 . The air produced by the blower of the combustion water heater flows to the rich combustion injection inlet 131 and the lean combustion injection inlet 121 through the pressure equalization chamber 21, and the air that passes through the pressure equalization chamber 21 can enter the rich combustion injection inlet 131 and the light combustion injection inlet 121 once. The air volume is more uniform to improve the combustion effect.

Thus, according to the burner 100 of the embodiment of the present invention, the first rich combustion flame port 118 and the second rich combustion flame port 119 of the combustion unit 1 are respectively located on both sides of a plurality of light combustion flame ports 141, so as to form a light combustion flame in the middle, and the two The side is a stable flame structure with a dense combustion flame, which achieves the purpose of reducing the flame temperature and controlling the emission of nitrogen oxides in the flue gas after combustion. And the cross-sectional area S1 of the rich combustion injection inlet 131 of the burner 100 and the cross-sectional area S2 of the lean combustion injection inlet 121 satisfy: S1/S2=0.20～0.40, the cross-sectional area S3 of the gas injection port of the rich combustion nozzle 15 The cross-sectional area S4 of the gas injection port of the lean combustion nozzle 16 satisfies: S3/S4=0.25˜0.65. And limit the structure of the burner 100 shell 11 and the primary air rate of the rich combustion and lean combustion, so that the air and gas introduced by the rich combustion inlet 131 and the lean combustion inlet 121 form a good ratio to further control the combustion The structural stability of the flame reduces the emission of nitrogen oxides.

In addition, the present invention also proposes a gas water heater including the burner 100 of the above embodiment.

Since the burner 100 according to the above-mentioned embodiment of the present invention has the above-mentioned technical effect, the gas water heater according to the embodiment of the present invention also has the above-mentioned technical effect, that is, the gas water heater according to the embodiment of the present invention, by setting the burner 100 , so that the stability of the flame structure can be improved, the temperature of the combustion flame can be lowered, and the emission of nitrogen oxides in the flue gas of the gas water heater can be reduced.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (12)

1. A kind of 1. burner, it is characterised in that including：

   At least one fuel element, the fuel element include：

   Burner shell, the burner casing body is interior to have the first dense combustion chamber, the second dense combustion chamber and light combustion chamber, the combustion Burner housing be equipped with connected with the described first dense combustion chamber and the second dense combustion chamber dense burning injection entrance, with it is described The light burning injection entrance of light combustion chamber connection, the first dense burning-flame port connected with the described first dense combustion chamber and described the Second dense burning-flame port of two dense combustion chamber connections and the light burning opening connected with the light combustion chamber；

   Fairing, the fairing is located in the light burning opening and the fairing is equipped with and the light burning Multiple light burning-flame ports of chamber connection, the first dense burning-flame port and the second dense burning-flame port are respectively positioned at the multiple The both sides of light burning-flame port；

   Primary air adjustable plate, the primary air adjustable plate are located at the dense burning injector entrance and the light burning injection The front side of entrance is to adjust air injection volume.

   Secondary air registers plate, the secondary air registers plate are located at the lower section of the fuel element, and the primary air is adjusted Plate extends downwardly and limits equal pressure chamber between the secondary air registers plate.
2. 2. burner according to claim 1, it is characterised in that the fairing and the both sides of the light burning opening Limit the first sidewalk for visually impaired people and the second sidewalk for visually impaired people between wall respectively, first sidewalk for visually impaired people is located at the described first dense burning-flame port and described more Between a light burning-flame port, second sidewalk for visually impaired people is between the described second dense burning-flame port and the multiple light burning-flame port.
3. 3. burner according to claim 1, it is characterised in that the maximum width of the light burning-flame port is W3, described The height of fairing is H, wherein, W3/H=0.03~0.30.
4. 4. burner according to claim 1, it is characterised in that the theoretical air requirement of combustion gas completely burned and gas quantity Ratio is Φ_S, the air capacity of the dense burning injection entrance and the mixing ratio of gas quantity are Φ_R, wherein,

   Φ_R/Φ_S=0.5~0.8.
5. 5. burner according to claim 1, it is characterised in that the theoretical air requirement of combustion gas completely burned and gas quantity Ratio is Φ_S, the air capacity of the light burning injection entrance and the mixing ratio of gas quantity are Φ_L, wherein,

   Φ_L/Φ_S=1.5~2.0.
6. 6. according to the burner any one of claim 1-5, it is characterised in that the burner shell includes：

   First light burning shell portion and the second light burning shell portion, the first light burning shell portion are connected with the described second light burning shell portion And limit jointly the light combustion chamber and it is described it is light burning opening, the fairing be located at the described first light burning shell portion and Between the second light burning shell portion and it is located at the light burning opening；

   First dense burning shell portion and the second dense burning shell portion, the first dense burning shell portion are connected with the described first light burning shell portion And positioned at the outside in the described first light burning shell portion, the first dense burning shell portion and the described first light burning shell portion limit jointly Go out the described first dense combustion chamber and the first dense burning-flame port, the second dense burning shell portion and the described second light burning shell portion It is connected and positioned at the outside in the described second light burning shell portion, the second dense burning shell portion and the described second light burning shell portion is common Limit the described second dense combustion chamber and the second dense burning-flame port.
7. 7. burner according to claim 6, it is characterised in that the burner shell further includes：

   Multiple connection sheets, the both ends of each connection sheet respectively with the described first dense burning shell portion and the second dense burning shell Portion is connected, and multiple connection sheets are by the described first dense burning-flame port, the second dense burning-flame port and the light burning-flame port Each is separated into multistage.
8. 8. burner according to claim 6, it is characterised in that the burner shell includes：

   Light burning injector, the light burning injector and the described first light burning shell portion and second light burning shell portion phase Even, the light burning injection entrance is located on the light burning injector；

   Dense burning injector, the dense burning injector are connected with the described first dense burning shell portion and the second dense burning shell portion And connected with the first dense combustion chamber and the second dense combustion chamber, the dense burning injector is located above the light burning injector, The dense burning injection entrance is located on the dense burning injector.
9. 9. according to the burner any one of claim 1-5, it is characterised in that the fuel element further includes：

   For providing the dense burner noz(zle) of combustion gas to the dense burning injection entrance, the dense burner noz(zle) draws with the dense burning Entry portal is corresponding；

   For providing the light burner noz(zle) of combustion gas to the light burning injection entrance, the light burner noz(zle) draws with the light burning Entry portal is corresponding.
10. 10. burner according to claim 9, it is characterised in that the cross-sectional area of the puff prot of the dense burner noz(zle) The cross-sectional area S4 of S3 and the puff prot of the light burner noz(zle) meet：S3/S4=0.25~0.65.
11. 11. according to the burner any one of claim 1-5, it is characterised in that the fuel element is multiple and edge The width arrangement of the fuel element.
12. 12. a kind of gas heater, it is characterised in that including the burner according to any one of claim 1-11.