JPH0622741U - Oiled hot water boiler - Google Patents

Abstract

(57) [Summary] [Purpose] Prevent incomplete combustion of oil-fired hot water boilers. [Structure] An air supply / exhaust cylinder 2 is provided above the main body 1. Body 1
There are boilers 3A and 3B inside. Boiler 3A, 3B
The burner 5 supported by supports 7a and 7b is provided at the lower part of the
There are a and 5b. Air required for combustion is taken into the air supply passage 4 from the air supply port 2a and supplied to the burners 5a and 5b. 6
Is a blower for blowing air into the burners 5a and 5b. The boilers 3A and 3B can be operated simultaneously or only one of them can be operated. The exhaust gas is discharged from the exhaust port 8a of the exhaust passage 8. Blower 6 is boiler 3
The air always rises in the two boilers 3A and 3B because it is turned on when operating either one of A and 3B at the same time. Therefore, the boiler 3A,
Even if only one of 3B is operated, the exhaust gas does not circulate between the boilers 3A and 3B, and the in-operation boiler does not cause incomplete combustion due to lack of oxygen.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an oil-fired hot water boiler, and more particularly to a means for preventing incomplete combustion due to backflow of exhaust gas discharged from the boiler.

[0002]

[Prior art]

 As shown in FIG. 2, for example, there is an oil-fired hot water boiler in which two boilers 13A and 13B are arranged side by side in a main body 11 having an air supply / exhaust cylinder 12 at the top. An air supply passage 14 is provided between the air supply port 12a in the upper part of the main body 11 on which the air supply / exhaust cylinder 12 is covered and the lower part of the two boilers 13A, 13B, and is necessary for operation (combustion) of the boilers 13A, 13B. To get good air. The upper portions of the boilers 13A and 13B are connected by a single exhaust passage 18, and the upper ends of the boilers 13A and 13B are opened toward the upper portion inside the supply / discharge cylinder 12. Further, either one of the two boilers 13A and 13B 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, one air supply passage 14 is branched at the lower part inside the main body 11, and each is connected to the blowers 16a and 16b provided at the lower part of the two boilers 13A and 13B, respectively. Since the upper part of the boiler is connected by one exhaust passage 18, an annular air passage is formed between the two boilers 13A and 13B. Therefore, for example, when the boiler 13A is operated and the boiler 13B is stopped, a pressure difference occurs between the two boilers 13A and 13B. Then, due to the pressure difference, a part of the exhaust gas on the boiler 13A side flows back to the boiler 13B side through the exhaust passage 18, returns to the air supply passage 14 via the burner 15b and the blower 16b, and returns from the air supply port 12a to the boiler 13A side. Will be mixed with the air supplied to the. Then, the amount of oxygen required for combustion is insufficient on the boiler 13A side, which causes a problem of incomplete combustion. Therefore, an object of the present invention is to provide an oil-fired hot water boiler that does not cause such a problem.

[0004]

Means for Solving the Problems The present invention has been made to solve the above problems, and two boilers are installed side by side in a main body having an air supply / exhaust tube, and the air supply of the air supply / exhaust tube is provided. The air taken in from the mouth through the air supply passage is distributed to the two boilers at the lower part of the main body, and the exhaust gases discharged from the upper parts of these two boilers are combined into one exhaust passage and discharged from the exhaust port. In the thus prepared oil-fired hot water boiler, a blower is provided at a branch point for distributing the air from the air supply passage to the two boilers.

[0005]

[Action]

 With the above configuration, since there is a blower at the branch point that distributes the air from the air supply passage to the two boilers, even if only one of the boilers is operated, the air from the air supply passage is always present. It will be distributed to two boilers. Therefore, even if only one of the boilers is operated, the exhaust gas will not flow backward in the other boiler and circulate to the operating boiler side.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. FIG. 1 shows an essential part of the oil-fired hot water boiler according to the present invention. 1 is a main body having an air supply / exhaust pipe 2 at the upper part, 3A and 3B are boilers arranged in parallel in the main body 1, 4 Is an air supply passage for supplying air from the air supply port 2a at the upper part of the main body 1 covered with the air supply / exhaust cylinder 2 to the respective burners 5a, 5b of the boilers 3A, 3B. The air supply passage 4 is branched into a burner 5a side and a burner 5b side in the lower part of the main body 1, and a blower 6 is provided at the branch point. Reference numerals 7a and 7b denote supporting members for supporting the burners 5a and 5b, etc., and the lower portions thereof are fixed to the main body 1, respectively. Reference numeral 8 denotes an exhaust passage provided in the upper portion of the boilers 3A and 3B for both, and its exhaust port 8a is directed to the upper portion in the supply / exhaust pipe 2.

By the way, the two boilers 3A and 3B can be operated simultaneously or only one of them can be operated. For example, when only the 3A side is operated, If the pressure is lower than the pressure on the 3A side, the exhaust gas on the 3A side may flow back to the 3B side due to the pressure difference. Therefore, in the present embodiment, as a means for preventing such a backflow of exhaust gas, the blower 6 is provided at the branch point of the air supply passage 4, and when the two boilers 3A and 3B are operated simultaneously, of course. Therefore, even when only one of the two is operated, air is simultaneously sent to the two boilers 3A and 3B so that no pressure difference is generated between the two boilers 3A and 3B. In this way, even if only the boiler 3A is operated, the exhaust gas does not flow back to the boiler 3B side and circulates to the 3A side, and all the exhaust gas is exhausted from the exhaust port 8a. Like

[0008]

[Effect of device]

 In the case of the oil-fired hot water boiler as described above, even if one of the two boilers is in operation and the other is not in operation, the air from the air supply port is simultaneously fed to the two boilers. Since it is supplied, the exhaust gas discharged from the boiler during operation does not flow back to the boiler side during operation, and incomplete combustion is less likely to occur, improving combustion efficiency and improving safety. At the same time, the number of blowers is halved, so there is a possibility of cost reduction.

[Brief description of drawings]

FIG. 1 is a side sectional view of an essential part of an oil-fired hot water boiler showing an embodiment of the present invention.

FIG. 2 is a side sectional view of an essential part of an oil-fired hot water boiler showing a conventional example.

[Explanation of symbols]

 1 Main Body 2 Air Supply / Exhaust Cylinder 2a Air Supply Port 3A Boiler 3B Boiler 4 Air Supply Line 5a Burner 5b Burner 6 Blower 7a Support 7b Support 8 Exhaust 8a Exhaust

Claims (1)

[Scope of utility model registration request] 1. Two boilers are arranged side by side in a main body provided with an air supply / exhaust tube, and air taken in from an air supply port of the air supply / exhaust tube via an air supply passage is supplied to the two boilers at a lower part of the main body. In an oil-fired hot water boiler that distributes and discharges the exhaust gas discharged from the upper parts of these two boilers into one exhaust path and discharges it from the exhaust port, the air from the air supply path is supplied to the two boilers. An oil-fired hot water boiler characterized in that a blower is installed at a branch point to distribute to.