JPH0123075Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a small boiler that is convenient for use in inconvenient locations such as mountainous areas, beaches, greenhouses, and construction sites.

(Prior art) Conventionally, as a small portable boiler, for example,
45-20372, Utility Model Publication No. 46-11954, etc., but in both of these, the boiler body is a double structure with a cylindrical inner can inserted into a cylindrical outer can. The inner and outer surfaces of the inner can are integrally attached by connecting devices such as heat sinks, gaskets, and tightening bolts, and a fire plate is attached to the inner wall of the outer can at the rear of the inner can. The structure is very complex, as a lid is attached to the rear opening of the can to seal the entire can, and it is troublesome to manufacture, there is a risk of gas leakage, and the thermal efficiency is poor. In addition, since it is an externally sealed body, it has drawbacks such as the inability to easily clean the inside of the casing from the outside.

(Purpose) The present invention simplifies the structure by reducing the number of parts in the case, making it easier to manufacture, eliminating gas leakage, etc., increasing thermal efficiency, and making it possible to obtain a large amount of hot water in a short period of time, while also making it easier to manufacture. To provide a small boiler that can be easily cleaned from the outside.

(Structure) FIGS. 1 to 3 show an embodiment of the present invention.

Reference numeral 1 denotes a machine stand, on which a cylindrical heating water can 2 is installed horizontally. This heating water can 2 has an opening 3a on one side and a cylindrical outer can 3 which is integrally closed on the other side with a curved fire pit mirror surface part 3b, and a certain gap between the outer can 3 and the outer can 3. The cylindrical inner can 4 includes an inner surface 4a and an outer surface 4b, which are arranged at a distance from each other, and each end of which is closed by a welded portion 4c.

Furthermore, a communication pipe 5 is provided at the upper part of the heating water can 2 to send water preheated in the outer can 3 to the inner can 4. 6 is a hot water outlet connected to the upper part of the inner can 4.

A motor 7, an air tank 8, a rotary blower 9 for supplying air to the air tank 8, and a water supply pump 10 for supplying water to the heating water can 2 are installed on the machine base 1. Reference numeral 11 denotes a cold water inlet provided in the water supply pump 10 and further connected to the lower part of the outer can 3 via a water distribution pipe 12.

13 is a combustion chamber, which is attached to the opening 3a side of the outer can 3. This combustion chamber 13 is provided with a cleaning port 14 for cleaning the inside of the heating water container 2, and is further fitted with a lid 14a that can be opened and closed.

Reference numeral 15 designates two hydraulic injection burners that are installed opposite each other with their respective nozzles oriented in a spiral direction so as to generate a spiral flame corresponding to the opening side of the heating water can 2. It is supported by a guide frame 16. Reference numeral 17 denotes a fan, which is arranged in the central through hole of the guide frame 16 and is adapted to send the flame emitted from the burner 15 into the opening of the heating water can 2 in a rotating manner. Two flame guide plates 18 are attached to the burner 15 in opposite directions so as to correspond to the respective nozzles in order to more effectively form a spiral flame.

19, 20, 21 are respective pulleys of the rotary blower 9, the water supply pump 10, and the fan 17;
They are connected to pulleys 22 of the motor 7 by V-belts 23, respectively.

24 is a drain valve, 25 is a hot water drain valve, 26 is a thermometer that indicates the water temperature in the communication pipe 5, and the protective box 2
It is stored in 7. 28 is also a protective box in which a thermometer for indicating the water temperature at the hot water outlet 6 is housed.

Reference numeral 29 is a fuel can, and 30 is a compressed air pipe, which is communicated with the air tank 8, and compressed air is sent from the air tank 8 to the fuel can 29 to push out the fuel. Reference numeral 31 denotes oil pipes for feeding the fuel pushed out from the fuel can 29 to the burners 15, respectively. Reference numeral 32 denotes a fuel pipe, the base of which is bifurcated, and each end thereof is directly connected to two burners 15, respectively. Reference numeral 33 denotes an oil strainer having a pot 34, to which the oil feed pipe 31 and the fuel pipe 32 are respectively connected. 34 is an exhaust pipe,
It is provided at the lower part of the outer can 3, and its tip is connected to the outer can 3.
It is designed to be directed laterally, and can also be directed upwards if necessary. 35 is a cover on the combustion chamber 13 side, and 36 is a plurality of loading fasteners. Further, 37 is a plurality of carrying handles attached to the outer surface of the heating water can 2, respectively.

(Function) When obtaining hot water from cold water with the small boiler configured as described above, first the motor 7 is started, and water is sucked up from the cold water inlet 11 by the water supply pump 10. The sucked water passes through the water pipe 12 and first fills the outer can 3. At the same time, compressed air is supplied to the fuel can 29 through the compressed air pipe 30 from the air tank 8 into which air is supplied from the rotary blower 9. The fuel is fed under pressure to the oil pipe 31, oil strainer 33, and fuel pipe 32.
The air then reaches the two burners 15, where it is mixed with the compressed air sent in from the compressed air pipe 30 and burned. The spiral flame caused by this combustion is swirled by the wind generated by the rotation of the fan 17 from the combustion chamber 13 through the inner can 4 to the back of the outer can 3, that is, the curved fire pit mirror surface part 3b. The high-temperature flame point of the flame is uniformly distributed and brought into contact with the inner surface 4a of the inner can 4, and the inside of the heating water can 2 is sufficiently heated. Inner can 4
The ends of the inner surface 4a and outer surface 4b are closed by welded parts 4c, and the inner part of the outer can 3 is integrally closed by the curved fire pit mirror surface part 3b. Efficient heat exchange takes place.

Furthermore, since the gas generated by combustion retains a large amount of heat, when it passes through the gap between the inner and outer cans 3 and 4 by forced gas from the fan 17, it also exchanges heat with the outer can 3. As a result, the water in the outer can 3 is heated.

The thus preheated water in the outer can 3 is sent into the inner can 4 through the communication pipe 5, where it is further heated and can be taken out from the hot water outlet 6.

In addition, when cleaning the inside of the heating water can 2, the inside of the can can be easily cleaned by supplying pressure water with a hose etc. from the cleaning port 14 provided in the combustion chamber 13. The water can be easily drained out of the can by removing the upwardly facing part of the exhaust pipe 34.

(Effects) According to the present invention, the structure of the cylindrical inner can is such that the ends of the inner and outer surfaces are integrally closed and sealed by welding. , it can be easily manufactured with a small number of parts and a small number of man-hours without using many tightening bolts, etc., and the structure of the cylindrical outer can has an opening on one side and a curved mirror surface on the other side. Since it has a structure in which the parts are integrally closed, it is possible to achieve more efficient heat exchange without requiring a separate fire plate or lid for the outer can as in the past, and it is extremely easy to manufacture. At the same time, a cleaning opening for cleaning the inside of the heating water can is provided in the combustion chamber attached to the opening side of the outer can, and a hose or the like is inserted through this cleaning opening to easily clean the inside of the heating water can with pressurized water. Moreover, the water after cleaning can be easily discharged from the exhaust pipe to the outside of the can, and combustion can be carried out without any problems.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a plan view, FIG. 2 is a side view, and FIG. 3 is a front view. 2... Heating water can, 3... Cylindrical outer can, 3a...
Opening, 3b... Curved fire pit mirror surface part, 4... Cylindrical inner can, 4a... Inner surface, 4b... Outer surface, 5...
...Communication pipe, 6...Hot water outlet, 11...Cold water inlet,
13... Combustion chamber, 14... Cleaning port, 15... Burner, 16... Guide frame, 17... Fan, 34...
...exhaust stack.

Claims (1)

[Scope of utility model registration request] A cylindrical outer can that has an opening on one side and is integrally closed on the other side with a curved fire pit mirror surface, and an inner surface and an outer can that are spaced apart from the outer can by a certain distance. A cylindrical inner can whose side ends are integrally closed by welding, a communication pipe connecting the inner can and the upper part of the outer can, and a cold water inlet connected to the lower part of the inner can;
A heating water can each having a hot water outlet connected to the upper part of the heating water can is provided, and a combustion chamber provided with a cleaning opening for cleaning the inside of the heating water can is provided on the opening side of the outer can in the heating water can. The small boiler is provided with an exhaust pipe at the lower part of the outer can, further supports a plurality of burners in the combustion chamber, and a guide frame with a fan arranged in the center is attached to surround the combustion chamber.