JP2764768B2 - Oil hot air 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 petroleum hot air heater having a cartridge type tank.

[0002]

2. Description of the Related Art FIG. 3 is a schematic sectional view of a conventional oil hot air heater. In the figure, 1 is a cartridge tank for storing kerosene, 1a is a handle used when taking the cartridge tank 1 in and out for refueling and the like, 2a and 2b
Is a guide for preventing tank tilt provided near the cartridge tank 1 to prevent the cartridge tank 1 from tilting, and 3 is located at the lower part of the cartridge tank 1 and adjusts the amount of kerosene from the cartridge tank 1. The equivalent sub-tank, 4 is a movable shaft supporting the cartridge tank 1 and the sub-tank 3, 4a is a fulcrum of the movable shaft 4, and 5 is a pressure resistance type weight sensor for measuring the total weight of the cartridge tank 1 and the sub-tank 3.

[0003] Reference numeral 7 denotes a combustor, which is connected to the sub tank 3 by an oil feed pipe 6. Reference numeral 8 denotes a combustion tube for burning a gaseous mixture of kerosene and air, 9 denotes a wind tunnel surrounding the combustion tube 8,
Is a blower that sends air to the wind tunnel, 11 is an outer case, 12 is an upper case, 13 is a tank lid on the upper part of the cartridge tank 1, and 14 is a table.

In this heater, the kerosene in the cartridge tank 1 enters the combustor 7 via the sub-tank 3 and the oil feed pipe 6, and becomes a vaporized gas. The vaporized gas is further mixed with air and ignites and burns in the combustion tube 8. The combustion gas generated by the combustion is converted into a suitable temperature by the air sent by the blower 10,
This passes through the wind tunnel 9 and exits from a hot air outlet (not shown) to heat the room.

The remaining amount of kerosene in the cartridge tank 1 in the above-described oil hot air heater is measured by a weight sensor (pressurization resistance type) 5 provided below the sub-tank 3, and It is converted from the total weight of the sub tank 3 and displayed on a display panel or the like.

[0006]

However, the weight sensor 5 is pressurized by the movable shaft 4 which rotates about the fulcrum 4a due to the weight of the cartridge tank 1 and the sub tank 3. When the amount of kerosene in the tank 1 is near full or empty,
As shown in the drawing, the cartridge tank 1 is inclined and comes into contact with the tank inclination preventing guides 2a and 2b, and the weight sensor 5 is affected by the frictional force, thereby making the weight measurement unstable.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and reduces the frictional force exerted on a weight sensor to increase the display accuracy of the residual oil amount in a cartridge tank and to refill a cartridge at the time of refueling. An object is to obtain an oil hot air heater that facilitates taking in and out of a tank.

[0008]

SUMMARY OF THE INVENTION The present invention provides a pressurized weight sensor for measuring the total weight of a cartridge tank and a subtank, and a function of displaying the residual oil amount by converting the total weight measured by the weight sensor. In the oil hot air heater provided, a spacer made of a polymer resin is attached to an upper portion of the tank tilting prevention guide arranged around the cartridge tank on the opposite side to at least the side on which the weight sensor is installed, When the amount of oil in the cartridge tank becomes empty or small and the cartridge tank is tilted to the side opposite to the weight sensor installation side, the upper part of the cartridge tank comes into contact with the spacer, and the cartridge tank and the tank tilt prevention guide are provided. Are not in direct contact with each other.

[0009]

In the petroleum warm air heater of the present invention, even if the cartridge tank is inclined, the cartridge tank only hits the spacer and does not directly contact the tank inclination preventing guide. Therefore, it is possible to prevent chatter between metals due to vibration of the blower, and since the spacer is made of a polymer resin having a smooth surface, the frictional contact resistance with the cartridge tank is reduced, and the measurement accuracy of the weight sensor is improved. Keep it constant and improve the display accuracy of residual oil in the cartridge tank.

[0010]

FIG. 1 is a schematic sectional structural view of an oil hot air heater according to an embodiment of the present invention, and FIG. 2 is a sectional structural view of FIG. 1 and 2, the same reference numerals as those in FIG. 3 denote the same components, and a description thereof will be omitted. 15a, 15
b is a spacer attached to the tank tilt preventing guide 2a, and 15c and 15d are spacers mounted to the tank tilt preventing guide 2b. These spacers 15a-
15d is located at substantially the same height above the cartridge tank 1, and the spacers 15a to 15d are made of a polymer resin, have a round rivet shape, and have a smooth surface.

The combustion operation itself of this heater is the same as that of the conventional example shown in FIG. However, when the kerosene amount in the cartridge tank 1 is near full or empty, even if the cartridge tank 1 is tilted, the cartridge tank 1 only contacts one or some of the spacers 15a to 15d and tilts the tank. There is no direct contact with the prevention guides 2a, 2b. The contact frictional resistance is reduced by the spacers 15a to 15d, and the influence of the frictional force on the weight sensor 5 is reduced. Therefore, the weight sensor 5
Irrespective of the amount of oil in the cartridge tank 1, stable measurement accuracy is always obtained, and the display accuracy of the residual oil amount in the cartridge tank 1 is also stabilized.

In this embodiment, the spacers are mounted at four positions. However, the spacers need only be of a minimum size capable of preventing the cartridge tank from contacting the guide for preventing the tank from tilting even if the cartridge tank is tilted. If it is a tank, it may be installed in three places.

[0013]

The measurement accuracy of the weight sensor is such that when the tilting prevention guide and the cartridge tank are in direct contact, the measurement accuracy of the kerosene amount becomes unstable due to the contact frictional force. When the amount of oil is large, the total weight of the tank is large and does not significantly affect the measurement accuracy.
However, when the amount of oil in the cartridge tank becomes empty or small, the total weight of the tank is small, and the contact frictional force has a great effect on the measurement accuracy. According to the present invention, the amount of oil in the cartridge tank becomes empty or small,
Even when the upper portion of the cartridge tank comes into contact with the polymer resin spacer, the contact frictional force is small, so that the accuracy of measuring the oil amount of the weight sensor is prevented from deteriorating, so that the accurate remaining oil amount can be displayed.

In addition, the cartridge tank can be smoothly taken in and out at the time of refueling, and it is effective in preventing chattering noise of the cartridge tank and the guide for preventing the tank from tilting due to vibration.

[Brief description of the drawings]

FIG. 1 is a schematic sectional structural view of an oil hot air heater showing one embodiment of the present invention.

FIG. 2 is a cross-sectional structural view of FIG. 1 as viewed from the AA direction.

FIG. 3 is a schematic sectional structural view of a conventional oil warm air heater.

[Description of Signs] 1 Cartridge tank 2a, 2b Guide for preventing tank tilt 3 Sub tank 4 Movable shaft 5 Weight sensor 6 Oil supply pipe 7 Combustor 8 Combustion cylinder 9 Wind tunnel 10 Blower 15a, 15b, 15c, 15d Spacer

Claims (1)

(57) [Claims] 1. An oil hot air heater having a pressurized weight sensor for measuring the total weight of a cartridge tank and a sub tank, and a function of displaying a residual oil amount by converting the total weight measured by the weight sensor. A spacer made of a polymer resin is attached to at least an upper part of a tank tilting prevention guide disposed around the cartridge tank on a side opposite to a side where the weight sensor is installed, and an oil in the cartridge tank is provided. When the amount of the cartridge tank becomes empty or small and the cartridge tank is tilted to the side opposite to the weight sensor installation side, the upper portion of the cartridge tank comes into contact with the spacer, and the cartridge tank and the tank tilt prevention guide are connected. Oil hot air heating system characterized by a structure that does not directly contact.