JPH0590130U - Oiled hot water boiler - Google Patents

Abstract

(57) [Summary] [Purpose] Prevent incomplete combustion of oil-fired hot water boilers. [Configuration] An air supply / exhaust cylinder 2 is provided on an upper portion of the main body 1. Body 1
There are two boilers 3A and 3B inside. Boiler 3
Blowers 6a and 6b and burners 8a and 8b supported by supports 7a and 7b are provided below A and 3B. Body 1
An air supply passage 4 having air supply pipe connection ports 4a and 4b in the upper part thereof
The air supply pipe connection ports 4a, 4b and the blowers 6a, 6b are connected by the air supply pipes 5a, 5b. Boiler 3A,
The exhaust gas of 3B is discharged from the upper exhaust port 9a through the exhaust passage 9. When only the boiler 3A is operated, a part of its exhaust gas enters the boiler 3B through the exhaust hole 3b, and the intake pipe 5
After backflowing b, it enters the air supply pipe 5a. Then, boiler 3
A falls into lack of oxygen and causes incomplete combustion. In order to prevent this incomplete combustion, the blower 6b on the side of the boiler 3B that is not in operation is operated at a predetermined rotation speed so that exhaust gas does not circulate in the main body 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an oil-fired hot water boiler, and more specifically to a means for preventing backflow of exhaust gas in the hot water boiler.

[0002]

[Prior Art]

 For example, as shown in FIG. 1, there is an oil-fired hot water boiler in which two boilers 3A and 3B are arranged side by side in a main body 1. An air supply / exhaust pipe 2 is provided above the main body 1, and the air required for combustion in the boilers 3A, 3B is supplied from the air supply port 2a of the air supply / exhaust pipe 2 into the air supply passage 4 provided in the upper part of the main body 1. After being taken in, the blowers arranged below the boilers 3A, 3B via the air supply pipes 5a, 5b connected to the air supply pipe connection ports 4a, 4b formed on the left and right of the air supply passage 4, respectively. It is supplied to 6a and 6b. Then, the exhaust gas of the boilers 3A, 3B is exhausted into the exhaust passage 9 from the exhaust holes 3a, 3b provided in the upper part of the two boilers 3A, 3B to be merged, and exhausted from the exhaust port 9a of the supply / exhaust cylinder 2. I am trying to do it. Further, either one of the two boilers 3A and 3B or both of them can be operated at the same time.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional example, the air supply pipes 5a and 5b are connected between the one air supply passage 4 and the two boilers 3A and 3B, and the exhaust holes 3a and 3b of the two boilers 3A and 3B are connected to each other. Since it is connected by the exhaust passage 9, an annular air passage is formed between the two boilers 3A and 3B. Therefore, for example, when the boiler 3A is operated and the boiler 3B is stopped, a pressure difference occurs between the two boilers 3A and 3B. Then, a part of the exhaust gas generated on the boiler 3A side flows backward through the exhaust passage 9 from the upper part to the lower part of the boiler 3B, rises in the air supply pipe 5b, and then the air supply port of the air supply / exhaust pipe 2 The air taken in from 2a flows to the burning burner 3A side, and the boiler 3A side lacks a sufficient amount of oxygen necessary for combustion, causing a problem of incomplete combustion. Therefore, it is an object of the present invention to provide an oil-fired hot water boiler that solves such problems.

[0004]

[Means for Solving the Problems]

 The present invention has been made to solve the above-mentioned problems, and two boilers are installed side by side in a main body equipped with an air supply / exhaust pipe, and are taken into the air supply passage from the air supply port of the air supply / exhaust pipe. The supplied air is supplied to the two boilers via the air supply pipes corresponding to the respective boilers, and the exhaust gas discharged from the exhaust holes formed in the upper parts of these two boilers is combined into one exhaust passage. In the oil-fired hot water boiler configured to discharge from the exhaust port of the air supply / exhaust pipe, when only one of the two boilers is operated, the blower on the other boiler side that is not in operation is It is designed to operate at a specified rotation speed, or to operate according to the rotation speed of the blower on the boiler side.

[0005]

[Action]

 With the above configuration, when only one of the two boilers is operated, the blower on the other boiler side that is not operating is operated at a specified rotation speed, or the other boiler side that is not operating Since the blower is operated according to the rotation speed of the blower on the operating boiler side, exhaust gas does not flow back to the boiler side when it is out of operation, and Circulation can be eliminated.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional side view of an essential part of an oil-fired hot water boiler. The air supply passage is divided into two parts, the air supply port 2a is located in the center of the upper part, and the air supply pipe connection ports 4a and 4b are located on the lower left and right. The air supply pipe connection ports 4a and 4b are connected to one ends of air supply pipes (tubes made of rubber or the like) 5a and 5b for supplying the air in the air supply passage 4 to the boilers 3A and 3B. The ends are connected to the intake ports of the blowers 6a and 6b provided at the bottoms of the boilers 3A and 3B, respectively. These blowers 6a and 6b are supported by supporting members 7a and 7b fixed to the main body 1, and burners 8a and 8b are provided between the blowers 6a and 6b and the boilers 3A and 3B, respectively. There is. Reference numeral 9 designates an exhaust passage shared by both of the boilers 3A and 3B, the exhaust pipe 9a of which is directed toward the upper part of the supply / exhaust pipe 2.

By the way, the boilers 3A and 3B can be operated (combusted) at the same time or can be operated only on the 3A side. However, when only the 3A side is operated, the exhaust gas May flow back to the 3B side. Therefore, in this embodiment, as a means for preventing the backflow of the exhaust gas generated on the 3A side, the blower 6b on the 3B side that is not operated is operated at a predetermined rotation speed. It is ideal that this predetermined rotation speed be slightly lower than the rotation speed of the blower 6a on the boiler 3A side (during combustion), but in the case of the present embodiment, the rotation speed of the blower 6a on the boiler 3A side to be operated is reduced. It is controlled to operate according to the number of turns.

FIG. 2 simply shows the state of the control. In step ST1, it is determined whether or not the boilers 3A and 3B are operating simultaneously. If they are operating simultaneously, the process proceeds to step ST2 and the burner 8a is operated. , 8b is started and the operation proceeds to step ST3 to operate the blowers 6a, 6b. If it is determined in step ST1 that only the boiler 3A is to be operated, the process proceeds to step ST4 to stop the fuel supply to the burner 8b, and then proceeds to step ST4 to simultaneously operate the blowers 6a and 6b. Therefore, the air flow in the boiler 3B is upward even when only the boiler 3A is in operation, and the exhaust gas from the boiler 3A does not flow to the boiler 3B.

[0009]

[Effect of the device]

 In the case of the oil-fired hot water boiler as described above, even if only one of the two boilers is operated, only the blower is operated, so the exhaust gas generated from the operating boiler is It will no longer flow back to the boiler side during operation and circulate in the body. Therefore, the boiler does not cause incomplete combustion, and the oil-fired hot water boiler is safe and has high combustion efficiency. In implementing the present invention, there is no need to add a special device or the like, and only the control program needs to be changed, so there is no need to worry about cost increase.

[Brief description of drawings]

FIG. 1 is a side sectional view of an essential part of an oil-fired hot water boiler according to the present invention and a conventional example.

FIG. 2 is a control flowchart showing an embodiment of the present invention.

[Explanation of symbols]

 1 Main Body 2 Air Supply / Exhaust Cylinder 3A Boiler 3B Boiler 4 Air Supply Line 5a Air Supply Line 5b Air Supply Line 6a Blower 6b Blower 8a Burner 8b Burner 9 Exhaust Line 9a Exhaust Port

Claims (2)

[Scope of utility model registration request] 1. A two boilers are arranged side by side in a main body having an air supply / exhaust pipe, and air taken into the air supply passage from an air supply port of the air supply / exhaust pipe is supplied to an air supply pipe corresponding to each boiler. The exhaust gas discharged from the exhaust holes formed in the upper part of these two boilers into a single exhaust passage to be discharged from the exhaust port of the supply / exhaust cylinder. In the oil-fired hot water boiler configured as described above, when only one of the two boilers is operated, the blower on the other boiler side that is not operated is operated at a predetermined rotation speed. Oil-fired hot water boiler to be. 2. When operating only one of the two boilers, the blower on the other boiler side, which is not operating, is operated corresponding to the rotation speed of the blower side blower to be operated. The oil-fired hot water boiler according to claim 1, wherein