KR20230104382A - Burner, water heating apparatus including same and control method of same - Google Patents

Abstract

A burner according to the present invention includes a fuel supply unit provided to provide fuel for a combustion reaction to a combustion chamber; an air supply unit having a blower provided to supply air for the combustion reaction to the combustion chamber as it rotates, and an air supply pipe connected to the blower so that air is transferred from the outside to the blower; an ignition unit provided to cause a spark to ignite the provided fuel and air; a pressure acquisition unit connected to the air supply pipe to obtain a pressure of air supplied to the air supply unit; and a processor electrically connected to the air supply unit and the pressure acquisition unit, wherein the processor: increases the rotational speed of the blower when the pressure value obtained by the pressure acquisition unit is smaller than a predetermined reference pressure value The blower is controlled so as to

Description

Burner, water heater including the same and control method thereof {BURNER, WATER HEATING APPARATUS INCLUDING SAME AND CONTROL METHOD OF SAME}

The present invention relates to a burner, a water heater including the same, and a control method thereof.

A water heater is a device that heats a fluid. This fluid may be water. The water heater may discharge heated water to a consumer or transfer it to a flow path for heating to heat a desired area. The water heater capable of heating may be a boiler.

In order to heat the water of the water heater, the water heater uses a burner to cause a combustion reaction to generate flame and combustion gas, and generally has a structure that can heat water using the heat transferred from the flame and the heat transferred by the combustion gas .

The burner creates an electrical spark in the air and fuel to cause a combustion reaction. Therefore, the burner needs to supply air and fuel, and the water heater needs to discharge the combustion gas generated by the combustion reaction through the flue.

When the flue connected to the water heater is formed long in the vertical direction and negative pressure is formed in the flue, the discharge speed of the combustion gas may be increased, and a lifting phenomenon in which the flame is not normally formed from the burner may occur. In the case of a burner used in a medium-sized boiler, it is difficult to deal with such a lifting phenomenon because it is possible to simply control the extent to which air is provided or not and fuel is supplied or not provided.

In addition, when the flue is long, resistance equal to the length of the flue may occur and explosive ignition may occur, and the flue may be torn or detached from its original position due to explosive ignition.

The present invention has been made to solve these problems, and provides a burner capable of responding to the load of the installation environment and causing stable combustion, a water heater including the burner, and a burner control method.

A burner according to an embodiment of the present invention includes a fuel supply unit provided to supply fuel for a combustion reaction to a combustion chamber; an air supply unit having a blower provided to supply air for the combustion reaction to the combustion chamber as it rotates, and an air supply pipe connected to the blower so that air is transferred from the outside to the blower; an ignition unit provided to cause a spark to ignite the provided fuel and air; a pressure acquisition unit connected to the air supply pipe to obtain a pressure of air supplied to the air supply unit; and a processor electrically connected to the air supply unit and the pressure acquisition unit, wherein the processor: increases the rotational speed of the blower when the pressure value obtained by the pressure acquisition unit is smaller than a predetermined reference pressure value The blower is controlled so as to

A water heater according to an embodiment of the present invention includes a combustion chamber provided to allow a combustion reaction to occur; burner; and a heat exchanger provided to receive the combustion gas generated by the combustion reaction and exchange heat with water, wherein the burner includes a fuel supply unit provided to supply fuel to the combustion chamber; an air supply unit having a blower provided to supply air to the combustion chamber as it rotates, and an air supply pipe connected to the blower so that air is transferred from the outside to the blower; an ignition unit provided to ignite the supplied fuel and air to generate a spark so that the combustion reaction occurs; a pressure acquisition unit connected to the air supply pipe to obtain a pressure of air supplied to the air supply unit; and a processor electrically connected to the air supply unit and the pressure acquisition unit, wherein the processor controls a rotational speed of the blower based on a pressure value acquired by the pressure acquisition unit and a predetermined reference pressure value. .

A burner control method according to an embodiment of the present invention includes obtaining a pressure of air supplied to a burner including a blower; comparing the obtained pressure value with a predetermined reference pressure value; and increasing a rotational speed of the blower that affects the pressure of air supplied to the burner when the obtained pressure value is smaller than the reference pressure value.

Accordingly, appropriate blower control is performed according to the load of the burner installation environment, and stable ignition and lifting phenomenon are reduced, so that stable combustion can occur.

1 is a perspective view showing a burner and a portion adjacent to the burner of a water heater according to an embodiment of the present invention.
2 is a perspective view of a burner of a water heater according to an embodiment of the present invention.
3 is a perspective view showing a rotating part of a blower according to an embodiment of the present invention.
4 is a conceptual diagram of a water heater system according to an embodiment of the present invention.
5 is a view showing a fuel valve of a burner according to an embodiment of the present invention.
FIG. 6 is a view showing the internal structure of the fuel valve of FIG. 5 by removing a portion thereof.
FIG. 7 is a view showing a feedback port, a fuel chamber, and a valve port of the fuel valve of FIG. 5;

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiment of the present invention, the detailed description will be omitted.

Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element may be directly connected or connected to the other element, but there may be another element between the elements. It should be understood that may be "connected", "coupled" or "connected".

1 is a perspective view showing a burner 10 and a portion adjacent to the burner 10 of a water heater 1 according to an embodiment of the present invention. 2 is a perspective view of the burner 10 of the water heater 1 according to an embodiment of the present invention.

Referring to the drawings, a water heater 1 according to an embodiment of the present invention includes a combustion chamber 20 and a burner 10. In the specification and drawings of the present invention, the up-and-down direction, the left-right direction, and the front-back direction are directions orthogonal to each other and are relative directions used for convenience of description, and may vary depending on the posture in which the water heater 1 is disposed.

The water heater 1 may include a combustion chamber 20, a burner 10 and a heat exchanger (not shown). The burner 10 is coupled to one side of the combustion chamber 20, and a part of the burner 10 may be inserted into the combustion chamber 20. The burner 10 may be coupled to the combustion chamber 20 along a horizontal direction. As shown, the burner 10 may be coupled to the combustion chamber 20 from the rear side of the combustion chamber 20 toward the front, but the coupled side and direction are not limited thereto.

A flame is formed in a part of the burner 10 inserted into the combustion chamber 20, and combustion gas is generated as the combustion reaction proceeds, and the combustion gas is transferred from the combustion chamber 20 to the heat exchanger, and the water and Water can be heated by heat exchange. The water heated in the heat exchanger can be provided for heating or as hot water.

The burner 10 may be a gun type burner 10 . The gun type burner 10 is a unitized burner 10 by integrating a component for providing air, a component for providing fuel, and a component for ignition.

The burner 10 may include fuel supply units 12 , 15 , 17 , and 18 , air supply units 13 and 14 , an ignition unit 19 , a pressure acquisition unit 16 , and a processor.

Ignition part (19)

The ignition unit 19 is provided to cause sparks to ignite supplied fuel and air. An end inserted into the combustion chamber 20 of the ignition unit 19 can generate a spark. The ignition inner end, which is the end of the ignition unit 19, is disposed in the combustion space, which is the internal space of the combustion chamber 20, so that a mixer to be described later. (113). In one embodiment of the present invention, the ignition unit 19 is described as an ignition plug-in, but a device that performs ignition in a method other than a spark plug may be used as the ignition unit 19 .

The ignition unit 19 may generate an electric spark to ignite a mixture of fuel and air. A flame may be formed as an electric spark is generated in a situation where the air and the fuel injected by the fuel supply units 12, 15, 17, and 18 are mixed through the mixer 113 to form a mixture.

The ignition inner end, which is the end of the ignition unit 19 in the reference direction, may be disposed adjacent to the fuel nozzle 12 of the fuel supply unit 12 , 15 , 17 , and 18 inside the combustion chamber 20 .

housing(11)

The burner 10 according to an embodiment of the present invention may include a housing 11 . The housing 11 is a skeleton of the burner 10, and may include a blower tube 112, a mixer 113, and a frame 111.

The frame 111 is a part connecting the blower tube 112 and the air supply units 13 and 14, and components to be described later may be combined and supported. The inside of the frame 111 is empty, so that air supplied by the air supply units 13 and 14 can be delivered to the blower tube 112 .

The blower tube 112 surrounds a portion of the fuel nozzle 12 and the ignition unit 19 inserted into the combustion chamber 20 and is connected to the air supply units 13 and 14 . The blower tube 112 may have an internal space in which the air pressured by the air supply units 13 and 14 flows, and a discharge opening that is an opening open along a reference direction toward the combustion space. The air pumped by the air supply units 13 and 14 can be discharged to the combustion space through the discharge opening, and can be mixed with the fuel to meet the generated spark to form a flame. Since the mixer 113 is positioned at the discharge opening, at least a portion of the discharge opening may be covered by the mixer 113 .

The blower tube 112 may have a cylindrical shape open along a reference direction. The blower tube 112 may be coupled to the combustion chamber 20 .

The mixer 113 is a component arranged for smooth flame formation. The mixer 113 may allow the fuel injected by the fuel supply units 12, 15, 17, and 18 to reach the combustion space by being mixed with the air provided by the air supply units 13 and 14.

To mix fuel and air well, the mixer 113 may have a plurality of mixing units. The mixing unit may be disposed at a position corresponding to the position of the plurality of fuel nozzles 12 . A plurality of mixing sections may be arranged along a circumferential direction surrounding a central circle. The mixing unit may have a mixing passage opened along the front and rear directions. Therefore, the fuel injected from the fuel nozzle 12 and the air may be mixed and discharged into the combustion space through each mixing passage. A plurality of mixing units may be combined to form an annular structure.

Air supply unit (13, 14)

3 is a perspective view showing a rotating part 132 of the blower 13 according to an embodiment of the present invention.

The air supply units 13 and 14 are components for pressurizing air supplied from the outside to the combustion chamber 20 . Accordingly, the air supply units 13 and 14 may include a blower 13 and an air supply pipe 14 for delivering air to the blower 13 .

The blower 13 is a device that supplies air for a combustion reaction to the combustion chamber 20 as it rotates. The blower 13 includes a wing part 131 that rotates and pressurizes air to the blower tube 112, and a rotating part 132 that generates rotational driving force to rotate the wing part 131 and transmits it to the wing part 131 can include The wing unit 131 may be a casing impeller. The rotating unit 132 may be a Brushless DC (BLDC) motor. Accordingly, precise speed control of the rotating unit 132 can be performed under the control of the processor. The wing part 131 may be rotatably arranged in the left and right directions in the axial direction, and the rotating part 132 may be coupled to the right side of the wing part 131 as shown.

The air supply units 13 and 14 may be controlled to force air to the blower tube 112 at a plurality of different wind speeds. The processor may control the rotating unit 132 to operate at various speeds by providing currents of different magnitudes to the rotating unit 132 . In the low stage, the processor may provide a predetermined low stage current to the rotating unit 132, and in the high stage, the processor may provide a high stage current greater than the low stage current to the rotating unit 132. The processor may control the air supply units 13 and 14 to operate at a low level at the time of ignition and at a high level after ignition.

The low stage means a state in which the motor of the blower 13 rotates at a low stage speed to provide air at a low stage wind speed, which is a predetermined wind speed. The low stage speed may be determined according to the low stage air ratio of the burner 10 or the amount of heat generated. The high stage means a state in which the rotating part 132 rotates at a high stage speed greater than the low stage wind speed to provide air at a high stage wind speed greater than the low stage wind speed.

The air supply pipe 14 is a pipe connected to the blower 13 to deliver air to the blower 13 from the outside. As shown, the air supply pipe 14 is connected to the left side of the wing 131 opposite to the rotation unit 132 around the wing unit 131 to deliver air to the rotation unit 132 . The air supply pipe 14 includes a connection pipe 141 connected to the rotating part 132 and extending downward from the right side of the blower 13, and an outer pipe 142 extending from the lower end of the connection pipe 141 to the right. can do. The connecting pipe 141 and the outer pipe 142 may be fastened to each other.

Pressure Acquisition Unit (16)

The pressure acquisition unit 16 is a component connected to the air supply pipe 14 to acquire the pressure of air supplied to the air supply units 13 and 14 . The pressure acquisition unit 16 may be an Atmospheric Pressure Sensor (APS), but the type is not limited thereto. The pressure acquisition unit 16 may be connected to the outer pipe 142 and pass through the outer pipe 142 to obtain pressure of air transmitted from the outside to the blower 13 . The pressure acquisition unit 16 may transmit the acquired pressure to the processor.

processor

The processor is a component including an element capable of performing logic operations for performing control commands, and may include a CPU (Central Processing Unit) and the like. The processor may be connected to various components to perform control by transmitting a signal according to a control command to each component, and may be connected to various sensors or acquisition units to receive acquired information in the form of a signal. Accordingly, in one embodiment of the present invention, the processor may be electrically connected to various components included in the water heater 1 . Since the processor can be electrically connected to each of the components, it can communicate with each other by further having a communication module that is connected with a wire or can communicate wirelessly.

The burner 10 further includes a storage medium so that control commands executed by the processor may be stored and utilized in the storage medium. The storage medium may be a device such as a hard disk drive (HDD), a solid state drive (SSD), a server, a volatile medium, or a non-volatile medium, but the type is not limited thereto. In addition, data required for the processor to perform tasks may be further stored in the storage medium.

The processor may be electrically connected to the air supply units 13 and 14 and the pressure acquisition unit 16 . Here, being electrically connected includes not only being physically connected to be energized, but also being connected to be able to communicate so that control signals can be exchanged with each other.

The processor may control the speed at which the blower 13 rotates based on the pressure value obtained by the pressure acquisition unit 16 and a predetermined reference pressure value. When the pressure value acquired by the pressure acquisition unit 16 is smaller than the reference pressure value, the processor may control the blower 13 to increase the rotational speed of the blower 13 . When negative pressure is generated in a long flue, the air pressure provided to the blower 13 is reduced, and thus a lifting phenomenon may occur. Therefore, in this case, as the processor controls the blower 13 to rotate more strongly and more air is supplied, a pressure condition in which normal combustion can occur without lifting occurs, that is, a pressure condition similar to the reference pressure can be formed. there is. Conversely, when an excessively high pressure value is acquired by the pressure acquisition unit 16, the processor may control the blower 13 so that the rotational speed of the blower 13 decreases.

The reference pressure value may be a preset value. The processor may use the pressure value obtained by the pressure acquisition unit 16 as the reference pressure value when the operation of the air supply units 13 and 14 is stopped and restarted.

Fuel supply unit (12, 15, 17, 18)

The fuel supply units 12 , 15 , 17 , and 18 are components that provide fuel for a combustion reaction, and may supply fuel to a combustion space inside the combustion chamber 20 . The fuel provided by the fuel providing units 12, 15, 17 and 18 may be a gas type fuel gas.

The fuel supply unit 12 , 15 , 17 , and 18 may include a fuel nozzle 12 . The fuel nozzle 12 is a component for injecting fuel. The fuel nozzle 12 may be configured in plurality. A plurality of fuel nozzles 12 are formed, so that divided flames can be formed to reduce nitrogen oxide emissions. When viewed along the reference direction, the plurality of fuel nozzles 12 may be disposed spaced apart from each other while surrounding the centrally located fuel nozzle 12 at the center. The plurality of fuel nozzles 12 may be disposed equiangular to each other with the ignition unit 19 as the center. Therefore, when viewed along the reference direction, a figure connecting positions where the plurality of fuel nozzles 12 are disposed may be a regular polygon.

The fuel supply unit 12 , 15 , 17 , and 18 may include a fuel valve 15 . The fuel supply unit 12 , 15 , 17 , and 18 may include a valve delivery pipe 17 for transferring fuel stored in the fuel tank to the fuel valve 15 . The fuel supply unit 12 , 15 , 17 , and 18 may include a nozzle delivery pipe 18 for transferring fuel discharged from the fuel valve 15 to the fuel nozzle 12 . As shown, the valve delivery pipe 17 includes a first valve delivery pipe 171 connected to the fuel tank and a plurality of valves for delivering fuel to the plurality of fuel valves 15 separated from the first valve delivery pipe 171. A second valve transmission pipe 172 may be included. The nozzle delivery pipe 18 includes a first nozzle delivery pipe 181 that collects the fuel discharged from the plurality of fuel valves 15 into one place, and the first nozzle delivery pipe 181 toward the fuel nozzle 12. It may include a second nozzle delivery pipe 182 that extends.

The fuel valve 15 may adjust the flow rate of fuel supplied to the combustion chamber 20 . The fuel valve 15 may adjust the flow rate of fuel supplied to the combustion chamber 20 according to the pressure of the combustion chamber 20 .

4 is a conceptual diagram of a water heater system 100 according to an embodiment of the present invention.

Referring to the drawings, a water heater system 100 according to an embodiment of the present invention may include a plurality of water heaters 1a and 1b. The plurality of water heaters 1a and 1b may be the same as the water heater 1 described above, and may be a first water heater 1a and a second water heater 1b, respectively. The first water heater 1a and the second water heater 1b may be connected to a common flue 101 through a first flue 102 and a second flue 103, respectively. When the first water heater 1a operates and the second water heater 1b does not operate, the combustion chamber 20 of the second water heater 1b is heated by the combustion gas discharged from the first water heater 1a. Internal pressure may increase. In this case, since the flow rate of the fuel provided to the second water heater 1b is relatively reduced compared to the amount of air, smooth combustion may not occur because a normal air-to-fuel ratio is not maintained.

5 is a view showing the fuel valve 15 of the burner 10 according to an embodiment of the present invention. FIG. 6 is a view showing the internal structure of the fuel valve 15 shown in FIG. 5 by removing a portion thereof. 7 is a view showing the feedback port 156, the fuel chamber 153, and the valve port 155 of the fuel valve 15 of FIG.

The fuel supply unit 12, 15, 17, 18 according to an embodiment of the present invention adjusts the opening degree of the fuel valve 15 according to the pressure of the combustion chamber 20, thereby overcoming the above-described problem. The fuel supply unit 12, 15, 17, 18 communicates with the inside of the combustion chamber 20 so that the opening of the fuel valve 15 is adjusted according to the pressure in the combustion chamber 20 and transfers pressure connected to the fuel valve 15. May include plumbing. The pressure inside the combustion chamber 20 is transmitted to the fuel valve 15 through the pressure transmission pipe, enabling feedback control. One end of the pressure transmission pipe is connected to the feedback port 156, and the other end is located inside the blower tube 112 to transfer the internal pressure of the combustion chamber 20 to the fuel valve 15.

The fuel valve 15 may include a feedback port 156 , a fuel chamber 153 and a valve port 155 . The fuel valve 15 may include a delivery chamber 151 and an opening/closing chamber 152 .

Fuel delivered to the fuel valve 15 through the valve delivery pipe 17 may flow into the delivery chamber 151 . The delivery chamber 151 may be connected to the opening/closing chamber 152 to deliver fuel to the opening/closing chamber 152 . An opening/closing valve body may be disposed in the opening/closing chamber 152 . The opening leading to the fuel chamber 153 may be opened and closed by the on-off valve body under the control of the processor. Accordingly, control of supplying or not supplying fuel can be performed in the opening/closing chamber 152 .

The fuel chamber 153 may receive fuel from the opening/closing chamber 152 and discharge it through a fuel opening leading to the nozzle delivery pipe 18 . That is, the fuel opening may lead to the fuel nozzle 12 and the combustion chamber 20 through the nozzle delivery pipe 18 . The valve port 155 can open and close the fuel opening. The valve port 155 may be driven by a differential pressure between the feedback port 156 and the fuel chamber 153 connected to the pressure transmission pipe and receiving the pressure atmosphere of the combustion chamber 20 . The fuel valve 15 may include a pressure transmission pipe and a feedback port 156 connected to the fuel chamber 153 .

Without feedback control, when the pressure in the combustion chamber 20 is high, less fuel is supplied to the combustion chamber 20 than when the pressure in the combustion chamber 20 is low, making it difficult to maintain a steady air-to-fuel ratio. In order to compensate for this, as the fuel valve 15 is provided as in one embodiment of the present invention, the higher the pressure in the combustion chamber 20, the higher the valve port 155 can open the fuel opening. As the pressure in the combustion chamber 20 is lowered, the valve port 155 may open the fuel opening with a lower opening degree. Therefore, in the water heater 1 according to an embodiment of the present invention, when the pressure in the combustion chamber 20 is high, more fuel is provided to the combustion chamber 20 by the fuel valve 15 than when the pressure in the combustion chamber 20 is low. Thus, a normal air-to-fuel ratio can be maintained.

The fuel valve 15 is composed of a plurality as shown, and may be connected in parallel with each other. The fact that the fuel valves 15 are connected in parallel means that each fuel valve 15 is not directly connected to each other in series, but receives fuel from the same valve delivery pipe 17 and supplies fuel to the same nozzle delivery pipe 18. means to release Fuel valves 15 are connected in parallel, and by controlling each fuel valve 15, it is not possible to provide a fixed amount of fuel, but rather to provide detailed proportional control of the amount of fuel, and proportional control is possible, so ignition and combustion are possible even with a low amount of heat. state can be maintained. Ignition is possible with a low heat quantity through the parallel valve connection structure, and low ignition pressure is generated to reduce impact on other parts connected to the combustion chamber 20 or other water heaters connected to the common flue, and ignition noise can be reduced. there is. In addition, since a plurality of inexpensive valves responsible for a small flow rate can be used, a more economical fuel supply structure can be formed than in the case of using a single expensive valve responsible for a large flow rate.

In the above, even though all components constituting the embodiment of the present invention have been described as being combined or operated as one, the present invention is not necessarily limited to these embodiments. That is, within the scope of the object of the present invention, all of the components may be selectively combined with one or more to operate. In addition, terms such as "comprise", "comprise" or "having" described above mean that the corresponding component may be present unless otherwise stated, and thus exclude other components. It should be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs, unless defined otherwise. Commonly used terms, such as terms defined in a dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and unless explicitly defined in the present invention, they are not interpreted in an ideal or excessively formal meaning.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

1: water heater
1a: first water heater
1b: second water heater
10 : burner
11: housing
12: fuel nozzle
13 : Blower
14: air supply piping
15: fuel valve
16: pressure acquisition unit
17: valve transmission pipe
18: nozzle delivery pipe
19: ignition part
20: combustion chamber
21: combustion chamber body
100: water heater system
101: common year
102: first year
103: second year
111: frame
112: blower tube
113: mixer
131: wing part
132: rotating part
141: connecting pipe
142: external piping
151: delivery chamber
152: opening and closing chamber
153: fuel chamber
155: valve port
156: feedback port
171: first valve transmission pipe
172: second valve transmission pipe
181: first nozzle delivery pipe
182: second nozzle delivery pipe

Claims (10)

a fuel supply unit provided to supply fuel for a combustion reaction to a combustion chamber;
an air supply unit having a blower provided to supply air for the combustion reaction to the combustion chamber as it rotates, and an air supply pipe connected to the blower so that air is transferred from the outside to the blower;
an ignition unit provided to cause a spark to ignite the provided fuel and air;
a pressure acquisition unit connected to the air supply pipe to obtain a pressure of air supplied to the air supply unit; and
A processor electrically connected to the air supply unit and the pressure acquisition unit,
The processor:
When the pressure value obtained by the pressure acquisition unit is smaller than a predetermined reference pressure value, the burner controls the blower to increase the rotational speed of the blower. According to claim 1,
The blower includes a wing portion that rotates and pressurizes air, and a rotating portion provided to rotate the wing portion,
The rotating part is a BLDC motor, a burner. According to claim 1,
The processor:
The burner, wherein a pressure value obtained by the pressure acquisition unit when the operation of the air supply unit is stopped and restarted is set as the reference pressure value. According to claim 1,
The fuel supply unit,
And a fuel valve provided to determine the flow rate of the fuel supplied to the combustion chamber according to the pressure of the combustion chamber. According to claim 4,
The fuel supply unit further includes a pressure transfer pipe communicating with the inside of the combustion chamber and connected to the fuel valve so that the opening of the fuel valve is adjusted according to the pressure in the combustion chamber. According to claim 5,
The fuel valve is
a feedback port connected to the pressure transfer pipe;
a fuel chamber including a fuel opening leading to the combustion chamber; and
A burner comprising a valve port that opens and closes the fuel opening and is driven by a differential pressure between the feedback port and the fuel chamber. According to claim 4,
The fuel valve is composed of a plurality,
The plurality of fuel valves are connected in parallel with each other, the burner. a combustion chamber provided to allow a combustion reaction to occur;
burner; and
A heat exchanger provided to receive the combustion gas generated by the combustion reaction and exchange heat with water,
the burner,
a fuel supply unit provided to supply fuel to the combustion chamber;
an air supply unit having a blower provided to supply air to the combustion chamber as it rotates, and an air supply pipe connected to the blower so that air is transferred from the outside to the blower;
an ignition unit provided to ignite the supplied fuel and air to generate a spark so that the combustion reaction occurs;
a pressure acquisition unit connected to the air supply pipe to obtain a pressure of air supplied to the air supply unit; and
A processor electrically connected to the air supply unit and the pressure acquisition unit,
The processor:
The water heater for controlling the speed at which the blower rotates based on the pressure value obtained by the pressure acquisition unit and a predetermined reference pressure value. According to claim 8,
The burner is a gun type burner, a water heater. obtaining a pressure of air provided to a burner including a blower;
comparing the obtained pressure value with a predetermined reference pressure value; and
and increasing a rotational speed of the blower that affects the pressure of air supplied to the burner when the obtained pressure value is smaller than the reference pressure value.

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