WO2018094944A1

WO2018094944A1 - Combustor and gas water heater having same

Info

Publication number: WO2018094944A1
Application number: PCT/CN2017/079170
Authority: WO
Inventors: 薛承志; 代先锋; 梁国荣
Original assignee: 芜湖美的厨卫电器制造有限公司
Priority date: 2016-11-25
Filing date: 2017-03-31
Publication date: 2018-05-31
Also published as: EP3460325A4; EP3460325B1; EP3460325A1

Abstract

A combustor and a gas water heater having same. A thin combustion opening (115) is provided on a combustor housing (11). A rectifying device (14) is provided in the thin combustion opening (115), and a plurality of thin combustion flame ports (141) is provided on the rectifying device (14). A first blind passage (116) and a second blind passage (117) are defined between the rectifying device (14) and two sidewalls of the thin combustion opening (115), respectively. The maximum width of the first blind passage (116) and the maximum width of the second blind passage (117) are equal and are W2, and the maximum width of the first rich combustion flame port (118) and the maximum width of the second rich combustion flame port (119) are equal and are W1, wherein W2≥W1.

Description

Burner and gas water heater with same

Technical field

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

Background technique

Due to the deteriorating ecological environment, human health has become more and more serious. People are paying more and more attention to air pollution. All industries are responding to the call of the state to save energy and reduce emissions. Due to the rapid development of urban gas, gas water heaters are more and more popular because of their convenience and speed. In the existing gas water heaters, harmful gases are inevitably generated due to the combustion of the gas, especially the high content of nitrogen oxides in the flue gas, which is serious to the environment.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, the present invention proposes a burner capable of reducing the emission of nitrogen oxides in the flue gas and reducing environmental pollution.

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

A burner according to an embodiment of the first aspect of the present invention, comprising at least one combustion unit, the combustion unit comprising: a burner housing having a first rich combustion chamber, a second rich combustion chamber, and a light combustion therein a cavity, the burner housing is provided with a rich combustion ejector inlet communicating with the first rich combustion chamber and the second rich combustion chamber, a light combustion ejector inlet communicating with the light combustion chamber, and a first rich combustion flame port communicating with the first rich combustion chamber, a second rich combustion flame port communicating with the second rich combustion chamber, and a light combustion opening communicating with the light combustion chamber; a rectifying device, the rectifying device Provided in the light combustion opening, wherein the rectifying device is provided with a plurality of light combustion flame ports communicating with the light combustion chamber, wherein the first rich combustion flame port and the second rich combustion flame port are respectively located at the plurality The first blind channel and the second blind channel are respectively defined between the rectifying device and the two sidewalls of the light combustion opening, and the first blind channel is located at the first rich combustion flame port and the Multiple light flame burners The second blind passage is located between the second rich combustion flame and the plurality of light combustion flames, wherein a maximum width of the first blind is equal to a maximum width of the second blind and is W2. The maximum width of the first rich combustion flame port is equal to the maximum width of the second rich combustion flame port and is W1, wherein W2 ≥ W1.

According to the burner of the embodiment of the invention, the first rich combustion flame port and the second rich combustion flame port of the combustion unit are respectively located on two sides of the plurality of light combustion flame ports to form a light combustion flame in the middle and a stable combustion flame on both sides. The flame structure achieves the purpose of reducing the flame temperature and controlling the emission of nitrogen oxides in the flue gas after combustion. The maximum width of the first blind track and the maximum width of the second blind track may be equal and W2, and the maximum width of the first rich combustion flame port is equal to the maximum width of the second rich combustion flame port and is W1, where W2 ≥ W1. Thereby further ensuring the structural stability of the combustion flame and reducing the emission of nitrogen oxides.

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

According to some embodiments of the invention, the distance between the two outer sidewalls of the fairing device is W3, and the height of the fairing device is H, wherein W3/H=0.03-0.30.

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

According to some embodiments of the present invention, the ratio of the theoretical air amount to the gas amount of the complete combustion of the gas is Φ _S , and the mixing ratio of the air amount and the gas amount of the light combustion ejector inlet is Φ _L , wherein 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 being connected to the second light combustion shell portion and common Defining the light combustion chamber and the light combustion opening, the rectifying device being disposed between the first light combustion shell portion and the second light combustion shell portion and located at the light combustion opening; a rich combustion shell portion and a second rich combustion shell portion, the first rich combustion shell portion being connected to the first light combustion shell portion and located outside the first light combustion shell portion, the first rich combustion shell And the first rich combustion chamber portion together define the first rich combustion chamber and the first rich combustion flame, the second rich combustion shell portion is connected to the second light combustion shell portion and located at the The outer side of the second light combustion shell portion, the second rich combustion shell portion and the second light combustion shell portion together define the second rich combustion chamber and the second rich combustion flame port.

Optionally, the burner housing further includes: a plurality of connecting pieces, wherein two ends of each of the connecting pieces are respectively connected to the first rich combustion shell portion and the second rich combustion shell portion, and a plurality of The connecting piece divides each of the first rich combustion flame, the second rich combustion flame, and the light combustion flame into a plurality of segments.

Optionally, the burner housing includes: a light combustion ejector connected to the first light combustion shell portion and the second light combustion shell portion, the light combustion lead a shot inlet is disposed on the light combustion ejector; a rich combustion ejector connected to the first rich combustion shell portion and the second rich combustion shell portion and first concentrated The combustion chamber is in communication with a second rich combustion chamber, the rich combustion ejector being located above the light combustion ejector, and the rich combustion ejector inlet being disposed on the rich combustion ejector.

According to some embodiments of the present invention, the combustion unit further includes: a rich combustion nozzle for supplying gas to the rich combustion ejector inlet, the rich combustion nozzle corresponding to the rich combustion ejector inlet; a light combustion nozzle that supplies gas to the light combustion ejector inlet, the light combustion nozzle corresponding to the light combustion ejector 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 light combustion nozzle satisfy: S3/S4=0.25-0.65.

Optionally, the burner further includes: a primary air conditioning plate disposed at an inlet of the rich combustion ejector and a front side of the inlet of the light combustion ejector to adjust air introduction The amount of radiation.

Further, the burner further includes: a secondary air conditioning plate, the secondary air conditioning plate is disposed under the combustion unit, the primary adjustment plate extends downward and is adjacent to the secondary air conditioning plate A pressure equalization chamber is defined between them.

According to some embodiments of the invention, the combustion units are plural and arranged along the width direction of the combustion unit.

A gas water heater having the burner of the above embodiment according to an embodiment of the second aspect of the present invention.

Since the burner according to the above embodiment of the present invention has the above-described technical effects, the gas water heater according to the embodiment of the present invention also has the above-described technical effects, that is, the gas water heater according to the embodiment of the present invention, by providing the burner of the above embodiment, thereby 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.

The additional aspects and advantages of the invention will be set forth in part in the description which follows.

DRAWINGS

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

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

Figure 3 is a cross-sectional view taken along line A-A of Figure 2;

4 is a top plan view of a combustion unit of a combustor in accordance with an embodiment of the present invention;

Figure 5 is an exploded view of a combustion unit of a burner in accordance with an embodiment of the present invention;

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

Figure 7 is a cross-sectional view taken along line B-B of Figure 6;

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

Reference mark:

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, 117: second blind, 118: first rich combustion flame, 119: second rich combustion flame;

12: light combustion ejector, 121: light combustion ejector inlet;

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

14: rectifying device, 141: light burning flame port;

15: rich combustion nozzle;

16: light burning nozzle;

17: Connecting pieces.

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the terms "longitudinal", "transverse", "length", "width", "upper", "lower", "front", "back", "left", " The orientation or positional relationship of the indications of the "right", "top", "bottom", "inside", "outside" and the like is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present invention and simplifying the description, rather than indicating It is to be understood that the device or elements referred to have a particular orientation, are constructed and operated in a particular orientation and are therefore not to be construed as limiting.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. Or in one piece; it may be a mechanical connection, or it may be an electrical connection or a communication with each other; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship between two elements. Unless otherwise expressly defined. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

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

As shown in connection with Figures 1-8, a burner according to an embodiment of the invention may comprise at least one combustion unit 1, each combustion unit 1 comprising a burner housing 11 and a rectifying device 14.

The burner housing 11 has a first rich combustion chamber 1111, a second rich combustion chamber 1121 and a light combustion chamber 1141. The burner housing 11 is provided with a first rich combustion chamber 1111 and a second rich combustion chamber 1121. a rich combustion ejector inlet 131, a light combustion ejector inlet 121 communicating with the light combustion chamber 1141, a first rich combustion flame port 118 communicating with the first rich combustion chamber 1111, and a second rich combustion communicating with the second rich combustion chamber 1121 The flame port 119 and the light burning opening 115 communicating with the light combustion chamber 1141.

The rectifying device 14 is disposed in the light combustion opening 115 and the rectifying device 14 is provided with a plurality of light combustion flame ports 141 communicating with the light combustion chamber 1141. The first rich combustion flame port 118 and the second rich combustion flame port 119 are respectively located in a plurality of light combustion The first blind channel 116 and the second blind channel 117 are respectively defined between the rectifying device 14 and the two sidewalls of the light burning opening 115 on both sides of the flame vent 141, and the first blind channel 116 is located at the first rich combustion flame port 118 and a plurality of light burning Between the flame ports 141, the second blind passage 117 is located between the second rich combustion flame 119 and the plurality of light combustion flame ports 141.

The maximum width of the first blind passage 116 and the maximum width of the second blind passage 117 may be equal and W2, and the maximum width of the first rich combustion flame 118 is equal to the maximum width of the second rich combustion flame 119 and is W1, wherein W2 ≥ W1 . Thereby The airflow stability of the flame mouth of the combustion unit 1 is ensured, thereby improving the structural stability of the combustion flame, so that the gas is fully burned, and the emission of nitrogen oxides in the flue gas is reduced.

In other words, the burner may include one or more combustion units 1, for example, the burner includes a plurality of combustion units 1, which are arranged side by side and arranged along the width direction of the combustion unit 1. The width direction is the left-right direction as shown in FIGS. 5 and 7. Each combustion unit 1 includes a combustor casing 11 and a rectifying device 14 that is disposed within the combustor casing 11.

A first rich combustion chamber 1111, a second rich combustion chamber 1121 and a light combustion chamber 1141 are defined in the burner housing 11, and the combustor casing 11 is provided with a rich combustion ejector inlet 131, a light combustion ejector inlet 121, and a first a rich combustion flame port 118, a second rich combustion flame 119 and a light combustion opening 115, a rich combustion ejector inlet 131 for concentrated combustion to introduce air, and a light combustion ejector inlet 121 for light combustion to introduce air, in combination with Figs. And as shown in FIG. 6, the rich combustion ejector inlet 131 is located above the light combustion ejector inlet 121.

The rich combustion ejector inlet 131 is in communication with the first rich combustion chamber 1111 and the second rich combustion chamber 1121, respectively, the first rich combustion chamber 1111 is in communication with the first rich combustion flame port 118, and the second rich combustion chamber 1121 and the second rich combustion flame port are 119 is connected, the light combustion ejector inlet 121 is in communication with the light combustion chamber 1141, and the light combustion chamber 1141 is in communication with the light combustion opening 115. The first rich combustion flame port 118 and the second light combustion flame port 141 are respectively disposed on both sides of the light combustion opening 115. .

Thus, air is introduced from the rich combustion ejector inlet 131 and mixed with the gas to form a concentrated combustion gas, and the mixed rich combustion gas can enter the first rich combustion chamber 1111 and the second rich combustion chamber 1121, respectively, and lead to the first A rich combustion flame 118 and a second rich combustion flame 119. The air introduced by the light combustion ejector inlet 121 is mixed with the gas to form a light combustion gas, and flows to the light combustion chamber 1141. 5 to 8, the rectifying device 14 is disposed in the light combustion opening 115, and the rectifying device 14 is provided with a plurality of light combustion flame ports 141, and the light combustion chambers 1141 are respectively connected with the plurality of light combustion flame ports 141, and the light combustion gas is light. It can lead to a plurality of light combustion flame ports 141.

4, 5, 7, and 8, a plurality of light combustion flame ports 141 are located between the first rich combustion flame port 118 and the second rich combustion flame port 119, so that a top end of each combustion unit 1 can be formed. The middle is a light combustion flame 141, and the sides are thick combustion flames. That is to say, the combustion unit 1 can form a middle light flame and a flame structure with a concentrated flame on both sides during combustion, thereby improving the stability of the flame, lowering 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. 7 and 8, the rectifying device 14 is disposed in the light combustion opening 115 and connected to both side walls of the light combustion opening 115, and defines a first blind channel 116 and a second blind channel 117 with the two side walls, respectively. The first blind passage 116 and the second blind passage 117 are not in communication with the light combustion chamber 1141. The first rich combustion flame port 118 and the plurality of light combustion flame ports 141 may be spaced apart by the first blind passage 116, and the second rich combustion flame 119 and the plurality of light combustion flame ports 141 may be spaced apart by the second blind passage 117, thereby making the flame The structure is more stable and effectively controls the emission of nitrogen oxides in the flue gas.

Specifically, as shown in FIG. 7 and FIG. 8, the maximum width of the first rich combustion flame 118 is the first rich combustion flame. 118 The maximum narrow side width in the left-right direction, the maximum width of the second rich combustion flame 119, that is, the maximum narrow side width of the second rich combustion flame 119 in the left-right direction. The maximum width of the first blind track 116 and the maximum width of the second blind track 117, that is, the maximum narrow side width of the first blind track 116 and the second blind track 117 in the left-right direction. The first narrow channel 116 and the second blind channel 117 have the same maximum narrow side width and are W2, and the first rich combustion flame port 118 and the second rich combustion flame port 119 have the same maximum narrow side width and are W1, the first blind channel 116 and the second blind channel. 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, W2 ≥ W1. Thereby, the stability of the combustion flame structure can be further improved.

Thus, according to the burner 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 the plurality of light combustion flame ports 141 to form a light combustion flame in the middle, two The side is a stable flame structure with a concentrated combustion flame, which achieves the purpose of reducing the flame temperature and controlling the emission of nitrogen oxides in the flue gas after combustion. The maximum width of the first blind passage 116 and the maximum width of the second blind passage 117 may be equal and W2, and the maximum width of the first rich combustion flame 118 is equal to the maximum width of the second rich combustion flame 119 and is W1, wherein W2 ≥ W1 . Thereby further ensuring the structural stability of the combustion flame and reducing the emission of nitrogen oxides.

In some embodiments of the present invention, the rich combustion ejector inlet 131 has a cross-sectional area S1, and the light combustion ejector inlet 121 has a cross-sectional area S2, and S1 and S2 may satisfy: S1/S2=0.20 to 0.40, That is, the cross-sectional area S1 of the rich combustion ejector inlet 131 is 0.20 to 0.40 times the cross-sectional area S2 of the light combustion ejector inlet 121. Thereby, the amount of air introduced by the rich combustion ejector inlet 131 and the light combustion ejector inlet 121 can be controlled, and the air introduced from the inlet of the rich combustion ejector 13 and the air introduced from the inlet of the light combustion ejector 12 can be respectively Forming a good mixing ratio with the gas to control the primary air rate of rich combustion or light combustion, that is, the ratio of the amount of air and the amount of gas when the gas and air are premixed, and the theoretical air that reacts with the complete combustion of the gas. The ratio of the amount to the amount of fuel in the air. Thereby, 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.

Optionally, as shown in FIG. 8, the top surface of the outer sidewall of the first blind channel 116 is flush with the top surface of the outer sidewall of the second blind channel 117 and higher than the top surface of the rectifying device 14, the first rich combustion flame 118 The top surface of the outer sidewall is flush with the top surface of the outer sidewall of the second rich combustion flame 119 and is higher than the top surface of the outer sidewall of the first blind 116 and the top surface of the outer sidewall of the second blind 117, the first blind 116 The height difference between the top surface of the outer side wall and the top surface of the outer side wall of the second blind passage 117 and the top surface of the rectifying device 14 is H1, the top surface of the outer side wall of the first rich combustion flame 118 and the second rich combustion flame 119 The height difference between the top surface of the outer side wall and the top surface of the rectifying device 14 is H2, where H2 ≥ H1. Thereby, it is advantageous to control the airflow stability of the rich combustion flame port and the light combustion flame port 141, thereby improving the stability of the combustion flame.

Preferably, H2 and H1 can satisfy H2>H1, so that the stability of the flame when the light combustion flame 141 and the rich combustion flame are burned can be further ensured to reduce the emission of nitrogen oxides in the flue gas.

In some embodiments of the present invention, the ratio of the theoretical air amount to the gas amount of the complete combustion of the gas may be Φ _S , and the mixing ratio of the air amount and the gas amount of the rich combustion ejector inlet 131 may be Φ _R , where Φ _R /Φ _S = 0.5 to 0.8.

Φ _R /Φ _S represents the primary air rate of rich combustion. By controlling the primary air rate of rich combustion, the gas and air are thoroughly mixed and have a good combustion ratio, so that the concentrated combustion gas is fully burned and a stable flame is formed. Structure to reduce nitrogen oxide emissions from flue gas.

In some embodiments of the present invention, the ratio of the theoretical air amount to the gas amount of the complete combustion of the gas may be Φ _S , and the mixing ratio of the air amount and the gas amount of the light combustion ejector inlet 121 may be Φ _L , where Φ _L /Φ _S = 1.5 to 2.0.

Φ _R /Φ _S represents the primary air rate of light combustion. By controlling the primary air rate of rich combustion, the gas and air are well mixed and have a good combustion ratio, so that the light combustion gas is fully burned and a stable flame is formed. Structure to reduce nitrogen oxide emissions from flue gas.

In some embodiments of the present invention, as shown in FIGS. 5, 7, and 8, the burner housing 11 may include a first light combustion shell portion 113 and a second light combustion shell portion 114 and a first rich combustion shell portion. 111 and the second rich combustion shell portion 112, the first light combustion shell portion 113 is connected to the second light combustion shell portion 114 and collectively defines a light combustion chamber 1141 and a light combustion opening 115, and the rectifying device 14 is disposed in the first light combustion shell Between the portion 113 and the second light combustion shell portion 114 and at the light combustion opening 115.

The first rich combustion shell portion 111 is connected to the first light combustion shell portion 113 and located outside the first light combustion shell portion 113, and the first rich combustion shell portion 111 and the first light combustion shell portion 113 together define the first rich combustion. The cavity 1111 and the first rich combustion flame port 118, the second rich combustion shell portion 112 is connected to the second light combustion shell portion 114 and located outside the second light combustion shell portion 114, and the second rich combustion shell portion 112 and the second light combustion chamber portion 112 The shell portions 114 collectively define a second rich combustion chamber 1121 and a second rich combustion flame 119.

As shown in FIGS. 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 rectifying device 14 is disposed at the light burning opening 115 and provided on the rectifying device 14 a light combustion flame port 141, a plurality of light combustion flame ports 141 are provided at the top end of the rectifying device 14, and the first rich combustion flame port 118 and the second rich combustion flame port 119 are respectively located at two sides of the plurality of light combustion flame ports 141, thereby facilitating the formation of the middle A light-burning flame with a stable flame structure that burns the flame on both sides to improve the stability of the flame, reduce the flame temperature, and reduce the emission of nitrogen oxides.

Advantageously, the burner housing 11 may further include a plurality of connecting pieces 17, each of which is connected to the first rich combustion casing portion 111 and the second rich combustion casing portion 112, respectively, and the plurality of connecting pieces 17 will Each of the first rich combustion flame 118, the second rich combustion flame 119, and the light combustion flame 141 is divided into a plurality of segments. Thereby, the light combustion flame and the rich combustion flame can be divided into a plurality of sections, thereby increasing the heat dissipation area of the flame and lowering the flame temperature.

The burner housing 11 may further include a light combustion ejector 12 and a rich combustion ejector 13 connected to the first light combustion shell portion 113 and the second light combustion shell portion 114, and the light combustion ejector The inlet 121 is disposed on the light burner; the rich combustion ejector 13 is connected to the first rich combustion shell portion 111 and the second rich combustion shell portion 112 and is in communication with the first rich combustion chamber 1111 and the second rich combustion chamber 1121, respectively. The rich combustion ejector 13 is located above the light combustion ejector 12, and the rich combustion ejector inlet 131 is provided on the rich combustion ejector 13. Thereby, the rich combustion ejector 13 can guide the gas and the introduced air to the first rich combustion chamber 1111 and the second rich combustion chamber 1121, and the gas and air are in the first rich combustion chamber 1111 and the second rich combustion chamber. The mixture is mixed in 1121, and 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 directed to the light combustion chamber 1141 by the light combustion ejector 12, and the gas and air can be mixed in the light combustion chamber 1141, and the mixed gas and air are led to the light combustion flame 141.

In some embodiments of the invention, the combustion unit 1 may further include a rich combustion nozzle 15 for supplying gas to the rich combustion ejector inlet 131 and a light combustion nozzle 16, which may be used for light combustion The ejector inlet 121 provides a light combustion nozzle 16 for the gas, the rich combustion nozzle 15 is in communication with the inlet of the rich combustion ejector 13, and the light combustion nozzle 16 is in communication with the light combustion ejector inlet 121. Thereby, the rich gas is injected into the rich combustion ejector inlet 131 through the rich combustion nozzle 15, and the gas is mixed with the air introduced by the rich combustion ejector 13 and leads to the first rich combustion chamber 1111 and the second rich combustion chamber 1121. Gas is injected into the light combustion ejector inlet 121 through the light combustion nozzle 16, and the gas is mixed with the air introduced by the light combustion ejector 12 and leads to the light combustion chamber 1141.

Alternatively, 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 light combustion nozzle 16 may satisfy: S3/S4 = 0.25 to 0.65. That is, the cross-sectional area of the gas injection port of the rich combustion nozzle 15 is 0.25 to 0.65 times the cross-sectional area of the gas injection port of the light combustion nozzle 16, whereby the vent opening of the rich combustion nozzle 15 and the light combustion nozzle 16 is designed. The cross-sectional area ratio, thereby controlling the ratio of the amount of gas and the amount of air of the rich combustion and the light combustion, such that the amount of air introduced by the light combustion ejector inlet 121 and the amount of gas injected by the light combustion nozzle 16 and the rich combustion ejector The amount of air introduced by the inlet 131 and the amount of gas injected by the rich combustion nozzle 15 are well proportional to make the combustion of rich combustion and rich combustion more complete, reducing the emission of nitrogen oxides.

Alternatively, the burner may further include a primary air conditioning plate provided at a front side of the rich combustion ejector inlet 131 and the light combustion ejector inlet 121 to adjust the amount of air ejector. Thereby, the amount of air introduced into the rich combustion ejector inlet 131 and the light combustion ejector inlet 121 can be adjusted by the primary air conditioning plate, thereby further controlling the ratio of the amount of air and the amount of gas in the rich combustion ejector inlet 131 and the light combustion ejector The ratio of the amount of air at the inlet 121 to the amount of gas.

Further, the burner may further include a secondary air conditioning plate disposed below the combustion unit 1, the primary adjustment plate extending downward and defining a pressure equalization chamber between the secondary air conditioning plate. Specifically, the primary air conditioning plate is disposed at a front side of the rich combustion ejector inlet 131 and the light combustion ejector inlet 121 to adjust the air ejector amount, and the secondary air conditioning plate is disposed below the combustion unit 1 to adjust the amount of air in the combustion chamber a lower end of the primary adjustment plate extends downwardly and defines a pressure equalization chamber between the secondary air conditioning plate, such that air generated by the air blower of the combustion water heater flows through the pressure equalization chamber to the rich combustion injection inlet 131 and the light combustion injection inlet 121, the primary air amount entering the rich combustion ejector inlet 131 and the light combustion ejector inlet 121 is made more uniform to improve the combustion effect.

In the following, a specific example of a burner according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the following description is only illustrative and not restrictive.

1 to 8, a burner according to an embodiment of the present invention may include a plurality of combustion units 1, a primary air conditioning plate, and a secondary air conditioning plate, and the plurality of combustion units 1 are arranged side by side and along the width of the combustion unit 1. Arrange in the direction.

Specifically, each combustion unit 1 includes a combustor casing 11, a rectifying device 14, a rich combustion ejector 13, a light combustion ejector 12, a rich combustion nozzle 15, and a light combustion nozzle 16. As shown in FIGS. 5, 7, and 8, the burner housing 11 includes a first light combustion shell portion 113 and a second light combustion shell portion 114, and a first rich combustion shell portion 111 and a second rich combustion shell portion 112, The first light combustion shell portion 113 is connected to the second light combustion shell portion 114 and collectively defines a light combustion chamber 1141 and a light combustion opening 115, and the rectifying device 14 is disposed at the first light combustion shell portion 113 and the second light combustion shell portion 114. Located between and at the light burning opening 115.

The first rich combustion flame port 118 and the second rich combustion flame port 119 are respectively located at two sides of the light combustion opening 115, the rectifying device 14 is disposed at the light burning opening 115, and the rectifying device 14 is provided with a plurality of light burning flame ports 141, a plurality of light The combustion flame port 141 is disposed at the top end of the rectifying device 14, and the first rich combustion flame port 118 and the second rich combustion flame port 119 are respectively located at two sides of the plurality of light combustion flame ports 141, thereby facilitating the formation of a middle light combustion flame and a concentrated combustion flame on both sides. Stable flame structure to improve flame stability, reduce flame temperature and reduce nitrogen oxide emissions.

The light combustion ejector 12 is connected to the first light combustion shell portion 113 and the second light combustion shell portion 114, the light combustion ejector inlet 121 is provided on the light burner, the rich combustion ejector 13 and the first rich combustion shell portion 111 is connected to the second rich combustion shell portion 112 and communicates with the first rich combustion chamber 1111 and the second rich combustion chamber 1121, respectively, the rich combustion ejector 13 is located above the light combustion ejector 12, and the rich combustion ejector inlet 131 is provided On the rich combustion ejector 13. Thereby, the rich combustion ejector 13 can guide the gas and the introduced air to the first rich combustion chamber 1111 and the second rich combustion chamber 1121, and the gas and the air can be mixed to the first rich combustion flame 118 and the second. Thick burning flame 119. At the same time, the gas and the introduced air can be directed to the light combustion chamber 1141 by the light combustion ejector 12, and the gas and air are mixed and then led to the light combustion flame 141.

The rich combustion nozzle 15 can be used to supply the rich combustion ejector inlet 131 with gas, the light combustion nozzle 16 can be used to supply the light combustion nozzle 16 to the light combustion ejector inlet 121, and the rich combustion nozzle 15 is connected to the rich combustion ejector 13 inlet. The light combustion nozzle 16 is in communication with the light combustion ejector inlet 121. Thereby, the rich gas is injected into the rich combustion ejector inlet 131 through the rich combustion nozzle 15, and the gas is mixed with the air introduced by the rich combustion ejector 13 and then led to the first rich combustion chamber 1111 and the second rich combustion chamber 1121. Gas is injected into the light combustion ejector inlet 121 through the light combustion nozzle 16, and the gas is mixed with the air introduced by the light combustion ejector 12 and then led to the light combustion chamber 1141.

Wherein, the cross-sectional area S1 of the rich combustion ejector inlet 131 and the cross-sectional area S2 of the light combustion ejector inlet 121 satisfy: S1/S2=0.20 to 0.40, the cross-sectional area S3 of the gas injection port of the rich combustion nozzle 15 and the light combustion The cross-sectional area S4 of the gas injection port of the nozzle 16 satisfies: S3/S4 = 0.25 to 0.65. Thereby, the ratio of the amount of gas to the air of the rich combustion ejector inlet 131 can be controlled. And the ratio of the amount of air to the amount of gas in the light combustion ejector inlet 121, thereby controlling the primary air rate of the rich combustion and the primary air rate of the light combustion.

The ratio of the theoretical air amount to the gas amount of the complete combustion of the gas may be Φ _S , the mixing ratio of the air amount and the gas amount of the rich combustion ejector inlet 131 is Φ _R , and the mixture of the air amount and the gas amount of the light combustion ejector inlet 121 The ratio is Φ _L , the concentrated combustion primary air rate is Φ _R /Φ _S and satisfies Φ _R /Φ _S =0.5-0.8, and the light combustion primary air rate is Φ _L /Φ _S and satisfies

Φ _L /Φ _S = 1.5 to 2.0. Specifically, by designing the ratio of the inlet area of the rich combustion ejector inlet 131 to the light combustion ejector inlet 121, the cross-sectional area of the gas injection port of the rich combustion nozzle 15 and the cross-sectional area of the gas injection port of the light combustion nozzle 16 can be controlled. The primary air rate of rich combustion and light combustion, so that the gas and air are well 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 FIG. 7 and FIG. 8, the first blind passage 116 and the second blind passage 117 may be respectively defined between the rectifying device 14 and the two side walls of the light combustion opening 115, and the first blind passage 116 is located at the first rich combustion flame port 118 and more. Between the light combustion flame ports 141, the second blind passage 117 is located between the second rich combustion flame 119 and the plurality of light combustion flame ports 141.

The top surface of the outer sidewall of the first blind passage 116 is flush with the top surface of the outer sidewall of the second blind passage 117 and higher than the top surface of the rectifying device 14, the top surface of the outer sidewall of the first rich combustion flame 118 and the second rich combustion The top surface of the outer side wall of the flame opening 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, 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 side wall and the top surface of the rectifying device 14 is H1, 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 to the rectifying device 14 The height difference of the top surface is H2, the maximum width of the first blind channel 116 is equal to the maximum width of the second blind channel 117 and may be W2, and 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 may be W1, where H2 ≥ H1 and W2 ≥ W1. Thereby, it is advantageous to control the airflow stability of the rich combustion flame port and the light combustion flame port 141, thereby improving the stability of the combustion flame.

The maximum width of the light combustion flame 141 may be W3, and the height of the rectifying device 14 may be H, where W3/H = 0.03 to 0.30. Preferably, W3/H = 0.05 to 0.20. Thereby, the structural stability of the rich combustion flame and the light combustion flame is further ensured.

A primary air conditioning plate may be provided at a front side of the rich combustion ejector inlet 131 and the light combustion ejector inlet 121 of the plurality of combustion units 1 to adjust the amount of air ejector. The amount of air introduced by the rich combustion ejector inlet 131 and the light combustion ejector inlet 121 of each combustion unit 1 can be adjusted by the primary air conditioning plate, thereby further controlling the ratio of the amount of air and the amount of gas in the rich combustion ejector inlet 131 and The ratio of the amount of air that burns the ejector inlet 121 to the amount of gas.

The secondary air conditioning plate is disposed below the combustion unit 1 to adjust the amount of air in the combustion chamber, and the primary adjustment plate extends downward and defines a pressure equalization chamber with the secondary air conditioning plate. The air generated by the blower of the combustion water heater flows through the pressure equalizing chamber to the rich combustion ejector inlet 131 and the light combustion ejector inlet 121, and the primary air amount entering the rich combustion ejector inlet 131 and the light combustion ejector inlet 121 through the pressure equalization chamber More uniform to improve the combustion effect.

Thus, according to the burner 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 the plurality of light combustion flame ports 141 to form a light combustion flame in the middle, on both sides. For the stable flame structure of the concentrated combustion flame, the purpose of reducing the flame temperature and controlling the emission of nitrogen oxides in the flue gas after combustion is achieved. Further, the cross-sectional area S1 of the rich combustion ejector inlet 131 of the burner and the cross-sectional area S2 of the light combustion ejector inlet 121 satisfy: S1/S2 = 0.20 to 0.40, and the cross-sectional area S3 of the gas injection port of the rich combustion nozzle 15 is The cross-sectional area S4 of the gas injection port of the light combustion nozzle 16 satisfies: S3/S4 = 0.25 to 0.65. The maximum width of the first blind passage 116 and the maximum width of the second blind passage 117 may be equal and W2, and the maximum width of the first rich combustion flame 118 is equal to the maximum width of the second rich combustion flame 119 and is W1, wherein W2 ≥ W1 . The structure of the burner housing 11 and the primary air ratio of the rich combustion and the light combustion are defined, so that the air introduced by the rich combustion ejector inlet 131 and the light combustion ejector inlet 121 forms a good ratio with the gas, and the combustion can be further improved. The structural stability of the flame reduces the emission of nitrogen oxides.

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

Since the burner according to the above embodiment of the present invention has the above-described technical effects, the gas water heater according to the embodiment of the present invention also has the above-described technical effects, that is, the gas water heater according to the embodiment of the present invention, by providing the burner of the above embodiment, thereby The temperature of the combustion flame can be lowered to reduce the emission of nitrogen oxides in the flue gas of the gas water heater.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined. Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A burner comprising at least one combustion unit, the combustion unit comprising:

a burner housing having a first rich combustion chamber, a second rich combustion chamber and a light combustion chamber, the burner housing being provided with the first rich combustion chamber and the second a rich combustion ejector inlet connected to the rich combustion chamber, a light combustion ejector inlet communicating with the light combustion chamber, a first rich combustion flame port communicating with the first rich combustion chamber, and communicating with the second rich combustion chamber a second rich combustion flame opening and a light combustion opening in communication with the light combustion chamber;

a rectifying device, the rectifying device is disposed in the light combustion opening, and the rectifying device is provided with a plurality of light combustion flame ports communicating with the light combustion chamber, the first rich combustion flame port and the second rich The combustion flames are respectively located at two sides of the plurality of light combustion flame ports, and the first blind channel and the second blind channel are respectively defined between the rectifying device and the two sidewalls of the light combustion opening, wherein the first blind channel is located at the Between the first rich combustion flame port and the plurality of light combustion flame ports, the second blind channel is located between the second rich combustion flame port and the plurality of light combustion flame ports,

Wherein the maximum width of the first blind track is equal to the maximum width of the second blind track and is W2, and the maximum width of the first rich combustion flame port is equal to the maximum width of the second rich combustion flame port and is W1. Among them, W2 ≥ W1.
The burner according to claim 1, wherein a distance between the outer side walls of the rectifying device is W3, and a height of the rectifying device is H, wherein W3/H = 0.03 to 0.30.
The burner according to claim 1, wherein a ratio of a theoretical air amount to a gas amount of the complete combustion of the gas is Φ S , and a mixture ratio of the air amount and the gas amount of the concentrated combustion ejector inlet is Φ R , among them,

Φ R /Φ S = 0.5 to 0.8.
The burner according to claim 1, wherein a ratio of a theoretical air amount to a gas amount of the complete combustion of the gas is Φ S , and a mixture ratio of the air amount and the gas amount of the light combustion ejector inlet is Φ L , among them,

Φ L /Φ S = 1.5 to 2.0.
A burner according to any one of claims 1 to 4, wherein the burner housing comprises:

a first light combustion shell portion and a second light combustion shell portion, the first light combustion shell portion being coupled to the second light combustion shell portion and collectively defining the light combustion chamber and the light combustion opening, a rectifying device is disposed between the first light combustion shell portion and the second light combustion shell portion and located at the light burning opening;

a first rich combustion shell portion and a second rich combustion shell portion, the first rich combustion shell portion being connected to the first light combustion shell portion and located outside the first light combustion shell portion, the first rich The combustion shell portion and the first light combustion shell portion together define the first rich combustion chamber and the first rich combustion flame port, and the second rich combustion shell portion is connected to the second light combustion shell portion and Located at an outer side of the second light combustion shell portion, the second rich combustion shell portion and the second light combustion shell portion together define the second rich combustion chamber and the second rich combustion flame port.
The burner of claim 5 wherein said burner housing further comprises:

a plurality of connecting pieces, two ends of each of the connecting pieces being respectively connected to the first rich combustion shell portion and the second rich combustion shell portion, the plurality of connecting sheets connecting the first rich combustion flame port, Each of the second rich combustion flame port and the light combustion flame port is divided into a plurality of segments.
The burner of claim 5 wherein said burner housing comprises:

a light combustion ejector connected to the first light combustion shell portion and the second light combustion shell portion, the light combustion ejector inlet being disposed on the light combustion ejector ;

a rich combustion ejector connected to the first rich combustion shell portion and the second rich combustion shell portion and to the first rich combustion chamber and the second rich combustion chamber, the rich A combustion ejector is located above the light combustion ejector, and the rich combustion ejector inlet is disposed on the rich combustion ejector.
The burner according to any one of claims 1 to 4, wherein the combustion unit further comprises:

a rich combustion nozzle for supplying gas to the rich combustion ejector inlet, the rich combustion nozzle corresponding to the rich combustion ejector inlet;

a light combustion nozzle for supplying gas to the light combustion ejector inlet, the light combustion nozzle corresponding to the light combustion ejector inlet.
The burner according to claim 8, wherein a cross-sectional area S3 of the gas injection port of the rich combustion nozzle and a cross-sectional area S4 of the air injection port of the light combustion nozzle satisfy: S3/S4 = 0.25 to 0.65 .
The burner of claim 8 wherein said burner further comprises:

A primary air conditioning plate is provided at an inlet of the rich combustion ejector and a front side of an inlet of the light combustion ejector to adjust an air ejector amount.
A burner according to claim 10, wherein said burner further comprises:

a secondary air conditioning plate, the secondary air conditioning plate is disposed below the combustion unit, and the primary adjustment plate extends downward and defines a pressure equalization chamber with the secondary air conditioning plate.
The burner according to any one of claims 1 to 4, wherein the combustion unit is plural and arranged in a width direction of the combustion unit.
A gas water heater comprising the burner according to any one of claims 1-12.