JP2603803B2 - Outdoor heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heater for outdoor use which uses combustion heat as a heat source. More specifically, the present invention relates to a measure against wind resistance of a heater for outdoor arrangement, which heats by radiant heat radiated from a combustion tube or the like by burning a burner.

[0002]

2. Description of the Related Art A heater using radiant heat transfer is more effective than a heater using convective heat transfer for warming in a windswept place such as a golf course or a stadium. In a place such as a golf course, a heater that can be used while a person stands, particularly a heater that warms the upper body is desired. Therefore, the present inventors have considered a stand-type heater that can be used by being moved anywhere and emits radiant heat from above.

[0003] This stand-type heater obtains solid radiation heat by burning a burner using a portable fuel such as propane gas to heat a combustion cylinder and an exhaust cylinder.
A combustion cylinder which also serves as a support is provided on a housing for accommodating a fuel gas cylinder, and a dish-shaped exhaust cylinder which is installed on the combustion cylinder and radiates radiant heat downward is provided. Since the heater is used outdoors, it needs a wind resistance to prevent the backflow of the combustion gas. As a measure against wind, it is not preferable to employ a forced air supply / exhaust method using a fan or the like because it is difficult to take a power supply when used outdoors such as a golf course. Therefore, in general, either a natural exhaust type (CF type) or a natural supply / exhaust type (BF type) must be adopted. But,
In the case where the combustion cylinder is arranged on the support and the structure is configured to radiate radiant heat from the support, it is difficult to adopt a natural supply / exhaust type (BF type) in which the exhaust cylinder and the air supply cylinder are arranged side by side. Therefore,
As shown in FIG. 6, large-diameter circular exhaust ports 103, 103 ′, and 10 slightly project from the upper end portion of the exhaust pipe 102.
3 ", a natural exhaust type (CF type) is adopted in which air is introduced into the combustion cylinder 101 by natural ventilation, raised therefrom, and discharged from the exhaust cylinder 102 at the upper end. An umbrella-shaped exhaust pipe top 104 is placed over the exhaust pipe 102 to prevent rainwater from entering and reflect the radiation heat radiated from the exhaust pipe 102 to the ground side. The bracket connects the cylinder top 104 and the exhaust cylinder 102.

[0004]

However, as shown in FIG. 6, when a wind blows between an umbrella-shaped exhaust pipe top 104 and a dish-shaped exhaust pipe 102 provided to prevent rainwater from entering. In the vicinity of one exhaust port 103, a gap is widened in the flow direction of the wind, so that the blow-through wind 107 draws out exhaust gas. In the vicinity of the opposite exhaust port 103 ′, the wind 107 is pushed into the exhaust port 103 ′ because the flow path is narrowed. A phenomenon occurs. For this reason, the amount of the air 108 sucked into the combustion cylinder 101 decreases, and in some cases, there is a risk of causing misfire.

An object of the present invention is to provide a heater for outdoor arrangement which does not affect the air supply and exhaust and does not cause a misfire even when the wind blows.

[0006]

In order to achieve the above object, an outdoor heater according to the present invention is provided with a combustion cylinder which also serves as a support on a housing for accommodating a fuel cylinder and a burner disposed at a lower end thereof. By supplying air through the burner by natural ventilation, secondary air is supplied around the burner, and at the upper end of the burner, a flue gas that introduces combustion gas and radiates radiant heat is arranged. While an exhaust pipe top for preventing intrusion is provided, an exhaust port having a narrow opening width in the radial direction is arranged in an annular shape in the exhaust pipe.

In the outdoor heater according to the present invention, the exhaust port is preferably a slit formed substantially continuously in a circumferential direction.

Further, in the outdoor heater according to the present invention, it is preferable that the combustion cylinder and the housing are connected by a tubular support, and an air supply port is opened in the housing.

[0009]

Therefore, even when the wind blows between the exhaust pipe top and the exhaust pipe, only the suction effect is produced at the exhaust port whose opening width is narrowed in the radial direction by a slit or a hole having a narrow gap. Therefore, the backflow of the wind and the combustion exhaust gas into the combustion cylinder does not occur.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will be described below in detail with reference to the embodiments shown in the drawings.

FIG. 1 to FIG. 4 show an embodiment of a heater for outdoor arrangement according to the present invention. This heater for outdoor arrangement also serves as a support, which houses a fuel cylinder 1 filled with a fuel, for example, liquefied petroleum gas such as propane gas or butane gas, and a gas burner 4 installed thereon via a support 3. A combustion tube 5 and an exhaust tube 6 installed at an upper end of the combustion tube 5 for introducing combustion gas generated in the combustion tube 5 and radiating radiant heat.
Covers the exhaust port 7 opened at the top of the exhaust pipe 6,
An exhaust pipe top 8 that prevents rainwater from entering and reflects radiant heat downward, and while the combustion gas generated in the combustion cylinder 5 by the combustion of the gas burner 4 is exhausted from the exhaust cylinder 6, the combustion cylinder 5 and the exhaust The cylinder 6 is heated to radiate solid radiation heat from the cylinder 6.

The housing 2 is formed of a cylindrical body having an internal space with a sufficient volume to accommodate the fuel cylinder 1, and a large-diameter seat 9 is provided at the bottom to prevent the heater from overturning. The housing 2 is provided with an openable and closable door 10 so that the fuel cylinder 1 can be replaced. Then, a piping assembly 11 including various adjusting valves, piping, and the like necessary for extracting gas from the fuel cylinder 1.
Are provided in the housing 2. This pipe assembly 11 is provided with a gas burner 4 provided in the upper combustion cylinder 5.
It is connected to the piping assembly 13 of the burner box 12 pulled out to the side. Therefore, if the pipe assembly 11 is connected to the fuel cylinder 1, the gas burner 4
Gas fuel can be supplied stably. A tubular support 3 protrudes from the center of the housing 2, and a burner box 12 is attached to an upper end of the support 3. Air that enters through a gap between the doors 10 of the housing 2 is not affected by wind and passes through the support 3. It is configured to be attracted to the burner box 12 side. That is, the air supply port 16 is opened in the housing 2. Further, a pipe 13 for a gas burner is provided inside the support 3.
The pipe assembly 11 is installed in the housing 2 and is connected to the pipe assembly 13 installed in the burner box 12.

The combustion cylinder 5 serving also as a support is supported by the support 3 via a burner box 12 that accommodates the gas burner 4. The burner box 12 is provided with a gas burner 4 and a piping assembly 13 incorporating valves for adjusting the fuel injection amount and pressure. Normally, the gas burner 4 sucks the surrounding air as primary air by the injection energy of the fuel gas by the ejector 14 at the base end, and injects the premixed gas. The combustion cylinder 5 is surface-treated so that its surface becomes black in order to easily radiate radiation heat.

At the upper end of the combustion tube 5, a dish-shaped exhaust tube 6 is provided so as to introduce combustion gas. As shown in FIGS. 1 and 2, the exhaust tube 6 is formed by overlapping a plate member 6 a and a lid member 6 b having substantially the same plate shape via a spacer 15 and fixing the plate member 6 a to form a plate-shaped exhaust passage. I have.
An exhaust port 7 composed of a slit with a narrow gap is formed by the rising portion on the periphery. In the case of this embodiment, the slit-shaped exhaust port 7 is formed in a substantially continuous annular shape except for a portion where the small spacer 15 is interposed.

However, the exhaust port 7 is not particularly limited to the slits shown in FIGS. 1 and 2, and may be any shape or size that does not easily cause the intrusion of air, that is, a shape having a narrow opening width in the radial direction. As shown in FIG.
5 may be provided frequently to form a small slit intermittently, or as shown in FIG. 5B, the exhaust port 7 may be formed by providing a large number of small-diameter holes. In this case, it is preferable to arrange them evenly in a ring shape so that the suction effect does not differ depending on the direction of the wind.
When the exhaust port 7 is formed by a small-diameter hole, the exhaust port 7 may be formed by punching an exhaust pipe, or may be formed to project like a nozzle.

An umbrella-shaped exhaust pipe top 8 is provided on the exhaust pipe 6 to cover the exhaust port 7 and protect it from rainwater. The exhaust pipe top 8 is fixed on the exhaust pipe 6 by a bracket 17.

According to the heater for outdoor arrangement of this embodiment configured as described above, the secondary air is supplied from the inside of the housing 2 to the periphery of the gas burner 4 by natural ventilation generated in the combustion tube 5 and is completely burned. . Then, the combustion gas rises in the combustion tube 5 and reaches the exhaust tube 6, and after being heated, is exhausted from the exhaust port 7. Therefore, the radiant heat is radiated from the combustion tube 5 and the exhaust tube 6, respectively, and the area below the exhaust tube 6 and around the combustion tube 5 is heated. Even if the wind blows between the exhaust pipe top 8 and the exhaust pipe 6, only the combustion exhaust gas is sucked out of the slit-shaped exhaust port 7 by the air flow. Therefore, even when the wind blows, the exhaust effect is not reduced, and the amount of air sucked into the combustion cylinder 5 is not reduced. For this reason, there is no possibility of misfire due to insufficient air.

The above embodiment is one preferred embodiment of the present invention, but the present invention is not limited to this embodiment, and various modifications can be made without departing from the gist of the present invention. For example, in the present embodiment, a case where a gas burner using LPG as a fuel is mainly described has been described, but the present invention is not particularly limited to this, and a liquid burner that burns a liquid fuel such as petroleum is used as a heat source. Also applicable to heaters.

[0019]

As is apparent from the above description, the heater for outdoor arrangement according to the present invention has a combustion cylinder which also serves as a support on a housing for accommodating a fuel cylinder and a burner disposed at the lower end thereof. Secondary air is supplied around the burner by allowing air to flow through the cylinder by natural ventilation, and an exhaust pipe that introduces combustion gas at the upper end of the combustion pipe and radiates radiant heat is placed, and rainwater intrudes on it. While the exhaust stack top to prevent is provided, the exhaust opening with a narrow opening width in the radial direction is arranged annularly in the exhaust stack, so even if wind blows between the exhaust stack top and the exhaust stack, the gap is narrow. Since only the suction effect occurs at the exhaust port having a narrow opening width in the radial direction such as a slit or a hole, the backflow of the combustion exhaust gas does not occur in the combustion cylinder, and the amount of air sucked into the combustion cylinder is reduced. Theft is not. Therefore, according to the outdoor heater of the present invention, there is no possibility that even if the wind blows, there is no shortage of air and a fire is caused.

[Brief description of the drawings]

FIG. 1 is a plan view of an exhaust pipe of an outdoor heater according to the present invention, and the exhaust pipe top is indicated by a virtual line.

FIG. 2 is a central longitudinal sectional view of an exhaust pipe of a heater for outdoor arrangement according to the present invention.

FIG. 3 is a front view showing a partially sectioned embodiment of the outdoor heater according to the present invention.

FIG. 4 is a sectional view showing a structure of a burner portion of the heater for outdoor arrangement according to the present invention.

FIGS. 5A and 5B are plan views showing another embodiment of the exhaust port, wherein FIG. 5A shows an exhaust port composed of an aggregate of short slits, and FIG. 5B shows an exhaust port composed of an aggregate of circular holes.

FIG. 6 is a central longitudinal sectional view showing a structure of an exhaust pipe when a natural exhaust system is applied to an outdoor heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fuel cylinder 2 Housing 3 Tubular support 4 Gas burner 5 Combustion cylinder 6 Exhaust cylinder 7 Exhaust port 8 Exhaust cylinder top

Claims (3)

(57) [Claims] 1. A combustion cylinder serving also as a support is installed on a housing for accommodating a fuel cylinder, and a burner is arranged at a lower end thereof. Air is caused to flow through the combustion cylinder by natural ventilation, so that two air flows around the burner. While supplying exhaust air, and arranging an exhaust pipe that introduces combustion gas and radiates radiant heat at the upper end of the combustion pipe and provides an exhaust pipe top that prevents infiltration of rainwater, the exhaust pipe is radially mounted on the exhaust pipe. A heater for outdoor arrangement, wherein exhaust ports having a narrow opening width are annularly arranged. 2. The exhaust port according to claim 1, wherein the exhaust port is a slit formed substantially continuously in a circumferential direction.
The heater for outdoor placement as described in the above. 3. The heater for outdoor arrangement according to claim 1, wherein the combustion cylinder and the housing are connected by a tubular support, and an air supply port is opened in the housing.