JPH04320703A - combustion device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device using petroleum as fuel for use in water heaters, space heaters, etc.

0002

2. Description of the Related Art As shown in FIG. 3, a conventional combustion apparatus of this type has two burners, that is, two vaporization/combustion paths in order to widen the variable range of combustion amount. To simplify the explanation, mainly one side will be explained.

Reference numeral 1 denotes a carburetor with a built-in heater 2, and 3 a nozzle communicating with a fuel supply device 4, which faces into the carburetor 1. 5 is a mixing chamber provided at a certain distance above the vaporizer 1, and 6 is a burner head provided above the mixing chamber 5, in which a flame port 7 and a secondary air port 8 are arranged alternately. It is located. 9 is an igniter facing the flame nozzle 7; 10 is a blower; combustion air is divided into the inside of the vaporizer 1 and the outside of the vaporizer 1 via an air chamber 11. A portion of the air sent outside the vaporizer 1 passes between the vaporizer 1 and the mixing chamber 5 and is sent into the mixing chamber 5, and a portion passes outside the mixing chamber 5 and enters the mixing chamber 5. The secondary air was sent to the secondary air port 8 of the burner head 6.

[0004] In the above configuration, the heater 2 is energized,
When a predetermined temperature is reached, the fuel supply device 4 and the blower 10 are operated, and the fuel is ejected from the nozzle 3 and becomes vaporized gas in the vaporizer 1. A part of the combustion air is sent through the air chamber 11 into the vaporizer 1, where it becomes vaporization air and is mixed with vaporized gas to form an air-fuel mixture. The rest is sent outside the vaporizer 1, and a part of it passes between the vaporizer 1 and the mixing chamber 5 and is sent into the mixing chamber 5, where it is further mixed with the air-fuel mixture and is then sent to the flame port 7 of the burner head 6.
More erupts. The remaining air passes outside the mixing chamber 5 and is blown out from the secondary air port 8 of the burner head 6. The air-fuel mixture ejected from the flame port 7 is ignited by the igniter 9 to form a combustion flame, and the secondary air ejected from the secondary air port 8 stabilizes the combustion flame.

[0005] When varying the combustion amount, when the maximum combustion amount is required, each burner is set to the maximum and both burners are fired, and when the combustion amount is to be reduced, each combustion amount is lowered. When the lower limit of each combustion amount is reached, combustion in one burner is stopped and the other burner is burnt at its maximum combustion amount. To further reduce the combustion amount, reduce the other combustion amount. When the minimum amount of combustion was required, the amount of combustion of the other burner was set to the minimum. In other words, when the maximum amount of combustion is required, the combustion amount of two burners is set to the maximum and two burners are burned, and when the minimum amount of combustion is required, the combustion amount of one burner is set to the minimum and one burner is burned. It was like that. Therefore, the variable range of the combustion amount of one burner is, for example, 1/
4, the variable width of the combustion device was 1/8.

[0006] Furthermore, when the amount of combustion is small, only one burner is burned, so the thermal stress on the heat exchanger installed above the burner is not uniform, and the heat exchange is affected by uneven thermal strain. There was a risk of cracks occurring in the container.

[0007]

However, in the above configuration, the variable width of the combustion device is multiplied by the number of burners of one burner, and in order to increase the variable width of the combustion device, the number of burners must be increased. The problem is that the configuration becomes complicated and expensive, and when the combustion amount is small, only one burner is fired, which increases the thermal stress on the heat exchanger installed above the burner. There was a problem that cracks were generated in the heat exchanger due to non-uniform thermal distortion.

[0008] The present invention solves this conventional problem by dividing the vaporization section, mixing section, and combustion section into one burner.
The aim is to achieve the same variable width as multiple burners with one simple and inexpensive burner, expand the variable width, and even out the thermal stress on the heat exchanger even when only the divided burners burn. do.

[0009]

[Means for Solving the Problems] In order to solve the above problems, the combustion apparatus of the present invention includes a burner head, a carburetor connected to the burner head and divided into three parts by a partition wall, and each of the three divided parts. a mixing chamber divided into three by a bottomed box-shaped partition wall provided at the lower part of the carburetor and the burner head; and a case that covers the burner head, the vaporizer, and the mixing chamber, and the burner head is divided into three parts by a partition wall of the mixing chamber, so that the entire burner head burns during maximum combustion, and during minimum combustion, the burner head is divided into three parts. It has a structure in which only the central part of the three parts is combusted.

0010

[Operation] According to the above-described structure, the burner, which is composed of one carburetor, mixing chamber, and burner head, is divided into three parts by the partition wall of the vaporizer and the partition wall of the mixing chamber. /4, the maximum combustion amount is the maximum combustion amount of each, and the minimum combustion amount is only the minimum combustion amount of the smaller split ratio, so the variable range of the combustion amount of this burner is (2 /3+1/3):1/12=12:
It becomes 1. Therefore, with one burner having an inexpensive and simple configuration, the combustion amount can be varied over the same range as the conventional two burners, and the range of variation can be expanded.

[0011] Also, during maximum combustion, the entire 3-divided burner is burned, and during minimum combustion, only the central portion of the 3-divided burner is burned, so for example, from the maximum combustion to the minimum combustion, a heat exchanger installed above the burner is used. Thermal stress on the vessel is always uniform.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 and 2, reference numeral 1 denotes a vaporizer with a built-in heater 2, which is divided into three parts by a vaporizer partition 3. As shown in FIG. 4 is a heat receiving wall provided at the top of the vaporizer 1 to receive combustion heat;
Reference numeral 5 denotes a temperature sensor of the vaporizer 1, which controls whether or not the heater 2 is energized. Reference numeral 6 denotes a nozzle corresponding to the carburetor 1 divided into three parts, communicating with the fuel supply device 7, and facing into the carburetor 1. Reference numeral 8 denotes a burner head connected to the vaporizer 1, in which a flame port 9 and a secondary air port 10 are arranged alternately. 11 is an igniter facing the flame opening; 12 is a mixing chamber provided below the vaporizer 1 and the burner head 8;
This mixing chamber 12 is divided into three parts by a mixing chamber partition wall 13 in the shape of a box with a bottom. The mixing chamber partition wall 13 also divides the burner head 8 into three parts. 14 is a case, and 15 is a blower. Combustion air is sent into the case 14 and branched into the inside of the carburetor 1 and the outside of the carburetor 1. The combustion air sent into the carburetor 1 is used as primary air.
The combustion air sent outside is used as secondary air in case 1.
4, the vaporizer 1, and the burner head 8, and are sent to the secondary air port 10.

In the above configuration, the heater 2 is energized,
When the temperature detector 5 detects a predetermined temperature, the fuel supply device 7
and the blower 15 is operated. The fuel is ejected into the carburetor 1 from a central nozzle 6 which is divided into three parts by the carburetor partition wall 3 among the nozzles communicating with the fuel supply device 7, and becomes vaporized gas. Combustion air is sent into the case 14 from the blower 10, and some of it is sent as primary air into the vaporizer 1, which is divided into three by the vaporizer partition wall 3, where it is mixed with vaporized gas to form a premixed mixture. The mixture is sent to a mixing chamber 12 divided into three parts by a chamber partition 13, where the mixture is promoted and ejected from the flame port 9 of the burner head 8 in the center. Other combustion air is sent as secondary air to the secondary air port 10 through the gap between the case 14, the carburetor 1, and the burner head 8. The premixture ejected from the flame port 9 is ignited by the igniter 11 to form a combustion flame, and the secondary air ejected from the secondary air port 10 stabilizes the combustion flame. Thereafter, when it becomes necessary to increase the amount of combustion, fuel is sent from the remaining nozzles 6, transferred to the remaining burner heads 8, and burned in the entire burner. The combustion heat of this combustion flame is received by the heat receiving wall 4 of the vaporizer 1, and when the vaporizer 1 reaches a predetermined temperature, the temperature detector 5 stops energizing the heater 2, and the vaporizer 1 becomes lower than the predetermined temperature. Then, energization of the heater 2 is started, and energization and de-energization of the heater 2 are repeated.

[0014] Here, if a burner consisting of one carburetor, mixing chamber, and burner head is divided into three by the partition wall of the vaporizer and the partition wall of the mixing chamber, and the variable range of the combustion amount of each is set to 1/4, By burning the maximum combustion amount at each maximum combustion amount, and burning only at the minimum combustion amount of the smaller split ratio for the minimum combustion amount, the variable range of the combustion amount of this burner is 12.
:1. Therefore, with one burner having an inexpensive and simple configuration, it is possible to obtain the same variable range of combustion amount as with a conventional two burner, and also to expand the variable range.

[0015] Also, during maximum combustion, the entire three-divided burner is combusted, and during minimum combustion, only the central portion of the three-divided burner is combusted, so that the heat exchanger installed above the burner from maximum combustion to minimum combustion This has the effect that thermal stress on (not shown) is always uniform.

[0016]

As described above, according to the combustion apparatus of the present invention, the following effects can be obtained.

(1) If a burner consisting of one carburetor, mixing chamber, and burner head is divided into three by the partition wall of the vaporizer and the partition wall of the mixing chamber, and the combustion amount of each is set to be, for example, 1/4, The maximum combustion amount is the maximum combustion amount of each burner, and the minimum combustion amount is only the minimum combustion amount of the smaller split ratio, so the variable range of the combustion amount of this burner is 1.
The ratio will be 2:1. Therefore, with one burner that is inexpensive and has a simple configuration, it is possible to obtain the same variable range of combustion amount as with the conventional two burners, and also to expand the variable range.

(2) During maximum combustion, the entire 3-divided burner is burned, and during minimum combustion, only the central portion of the 3-divided burner is burned, so from maximum combustion to minimum combustion, the heated area provided above the burner Thermal stress on objects can always be uniform.

[Brief explanation of drawings]

FIG. 1: A cross-sectional view of the main parts of a combustion device in an embodiment of the present invention.

[Figure 2] Longitudinal cross-sectional view

[Figure 3] Longitudinal cross-sectional view of main parts of a conventional combustion device

[Explanation of symbols]

1. Vaporizer 2 Heater 3. Vaporizer bulkhead 6 Nozzle 8 Burner head 12 Mixing chamber 13　Mixing chamber partition wall 14 Case

Claims (1)

[Claims] Claim 1: A burner head, a carburetor connected to the burner head and divided into three parts by a partition wall, and a fuel supply device which is arranged to face the inside of the carburetor in correspondence with each of the three divided carburetors, and a fuel supply device. Three communicating nozzles, a mixing chamber divided into three by a bottomed box-shaped partition provided at the lower part of the vaporizer and the burner head, and covering the burner head, the vaporizer, and the mixing chamber. The combustion device consists of a case, the burner head is divided into three parts by a partition wall of the mixing chamber, and the entire burner head is combusted during maximum combustion, and only the burner head in the middle of the three divisions is combusted during minimum combustion.